Proper way to connect iPad, Apple Watch, PM5, iPhone, and HR monitor?

I recently got my rower and want to use my iPhone and iPad during rowing sessions. I also have an Apple Watch and a Tickr Fit for heart rate. I’ve searched and looked through various setups.

I’m a little confused on the best way to use that I have to track workouts in the Apple Fitness app and ErgData without duplication.

I’m looking at scenarios where I may want to use my iPad for rowing sim apps or other visuals.

What’s the best approach so I can set it up once and it will just work without a lot of fiddling around for each workout?