Tyrell,
Getting your PPL prior to enrollment is fine if you feel like you might need more time to learn at your own pace. Don’t assume that it will save you money though. It might. Based on experience, most likely it won’t.
Taking as many written tests as you can is the best thing you can do. That’s pretty much it. When you sign up for the program, keep this article handy:
https://airlinepilot.life/t/what-does-an-atp-student-need-to-do-to-be-successful/10421/5.
I had no problem hearing the engine with my Bose headset. Maybe this headset would be good for you?
https://www.sportys.com/pilotshop/david-clark-pro-xp-panel-powered-headset.html. It’s noise canceling, but the ear seals don’t cover the ear like the Bose do.
Tory