How do I post data/readings from the nRF5340 to a web page?

Question

Hello,

I have a:
nRF5340DK connected to Windows10 PC via USB.

I also have these that are working fine in terms of being able to communicate with the nRF5340DK over Bluetooth:
nRF52840 BLE Dongle
nRF Connect and nRF Cloud Gateway on Android smartphone

For the final product, I intend to use BLE to send data from the nRF5340 to a smartphone app to send to a web page, but for the purposes of development, what is the best/easiest way to send data from the nRF5340DK via http to a web page? (Can you point to an example?)

Is there a way I can do it through the Windows10 PC connected via USB? If so, can I use the Application Core of the nRF5340?

Or do I need to use BLE as part of the Network Core to do this?

I have tried using the http_client, http_get, and echo_server projects that come with the nRF Connect SDK.
Below are my outputs, but it looks like I am misunderstanding how to use the correct network interfaces required for this.

I ran these on the Application Core. When I ran them on the Network Core I received no output at all on the terminal.
Does the Network Core require different terminal settings (com port, baud, parity, etc)? I am using Termite as my terminal.

Output using "~\ncs\v1.5.1\zephyr\samples\net\sockets\http_client":

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/net/sockets/http_client/README.html

*** Booting Zephyr OS build v2.4.99-ncs2  ***
[1B][1;32muart:~$ [1B][m
[1B][1;32muart:~$ [1B][m

[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:33.542,358] [1B][1;31m<err> net_config: Timeout while waiting network interface[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:33.552,368] [1B][1;31m<err> net_config: Network initialization failed (-62)[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:43.382,598] [1B][1;31m<err> net_ctx: Cannot bind to 0.0.0.0[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:43.390,838] [1B][1;31m<err> net_http_client_sample: Cannot connect to IPv4 remote (-49)[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:43.736,999] [1B][1;31m<err> net_ctx: Cannot bind to ::[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:43.744,781] [1B][1;31m<err> net_http_client_sample: Cannot connect to IPv6 remote (-49)[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:43.755,554] [1B][0m<dbg> net_http.Data to send
                                  47 45 54 20 2f 20 48 54  54 50 2f 31 2e 31 0d 0a |GET / HT TP/1.1..
                                  48 6f 73 74 3a 20 31 39  32 2e 30 2e 32 2e 32 0d |Host: 19 2.0.2.2.
                                  0a 0d 0a                                         |...              [1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:43.789,947] [1B][0m<dbg> net_http.Data to send
                                  47 45 54 20 2f 20 48 54  54 50 2f 31 2e 31 0d 0a |GET / HT TP/1.1..
                                  48 6f 73 74 3a 20 32 30  30 31 3a 64 62 38 3a 3a |Host: 20 01:db8::
                                  32 0d 0a 0d 0a                                   |2....            [1B][0m

Output using "~\ncs\v1.5.1\zephyr\samples\net\sockets\http_get":

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/net/sockets/http_get/README.html

*** Booting Zephyr OS build v2.4.99-ncs2  ***
[00:00:00.508,422] [1B][1;31m<err> net_if: There is no network interface to work with![1B][0m
[00:00:00.620,361] [1B][1;31m<err> net_ctx: Cannot bind to 0.0.0.0[1B][0m
[00:00:00.620,391] [1B][1;33m<wrn> net_dns_resolve: Cannot initialize DNS resolver (-125)[1B][0m
[00:00:00.624,420] [1B][0m<inf> net_config: Initializing network[1B][0m
[00:00:00.624,450] [1B][0m<inf> net_config: Waiting interface -1 ((nil)) to be up...[1B][0m

Additionally I have gone through the documentation for "Networking with the host system" and "USB Device Networking":

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/networking/networking_with_host.html#networking-with-host

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/networking/usbnet_setup.html#usb-device-networking-setup

It seems to imply I need to set up a "Socket Echo Server" on the board which I did, but still receive the errors below.

Output from running "~\ncs\v1.5.1\zephyr\samples\net\sockets\echo_server"

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/net/sockets/echo_server/README.html#sockets-echo-server-sample

*** Booting Zephyr OS build v2.4.99-ncs2  ***

[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:00:00.497,894] [1B][1;31m<err> net_if: There is no network interface to work with![1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:00:00.502,014] [1B][0m<inf> net_config: Initializing network[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:00:00.502,044] [1B][0m<inf> net_config: Waiting interface -1 ((nil)) to be up...[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:33.502,990] [1B][1;31m<err> net_config: Timeout while waiting network interface[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:33.503,021] [1B][1;31m<err> net_config: Network initialization failed (-62)[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:41.685,729] [1B][0m<inf> net_echo_server_sample: Run echo server[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:41.685,760] [1B][0m<inf> net_echo_server_sample: Waiting network to be connected[1B][0m
[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[1B][1;32muart:~$ [1B][m

I feel like what I am doing is overly convoluted for something that should be very simple to get network connectivity for development purposes to post to a web page. Please advise.

Also, any idea why I receive all the extra characters in the output like "[1B][1;32muart:~$ [1B][m[1B][8D[1B][J[00:01:33.542,358] [1B][1;31m" and what does it mean or how do I get rid of it?
Thank-you!