I would suggest to start first with "I dont know how app works" and get through nRF5 Getting Started section, possibly also through Tutorials on this page.
There indeed are lots of people on this forum, that could make firmware for You for monies, if you want to achieve your goal without learning effort.
There indeed are lots of people on this forum, that could make firmware for You for monies, if you want to achieve your goal without learning effort.