Newbie wanting to learn gyro for Marvel Rivals, have a couple questions!

Hi guys I’ve begun the journey of educating myself on gyro & it’s much more complex than I anticipated!

Thankfully this sub is pretty active and extremely educated so thanks in advance for any help!

My questions are:

1. Is it possible to setup gyro on steam but still play my games on epic launcher? I almost exclusively use epic since all my games are downloaded on there

2. For a game that doesn’t have dual input like Marvel Rivals, is it somehow still possible for me to move around with my left stick as normal with gyro? Or will I be stuck to using the left stick as a WASD movement style?

3. Is Bluetooth okay for gyro or should I always have my DS4 controller connected via cable?

4. How hard is it to adjust to gyro? I’ve always been a casual gamer and could never make the switch to KBM so will this pretty much be the same thing?