Which step should I take to develop a real time heart rate sharing app for watch Gear S3 frontier?

Hi everyone, I’m new to the development of watch app and I want to develop an application that can share heart rate at real time and display heart beat info on the watch face, while the watch itself can measure your heart rate, would it be possible if those heart rate can be shared with connected partner using the app whether on phone or on the watch itself? ? If so what would be the necessary step to develop such application from coding to server hosting to deployment?

Any help and suggestion, idea from you guys would be greatly appreciated