Brakes and Rotors, Check Engine P0456

Brakes first: I am being quoted over $1400 from the local german auto shop for brakes and rotors, but they insisit on only using OEM parts. I don't want to put OEM brakes on this car as I need a new set at 35k miles. The other reliable mechanic nearby wants to use some generic rotors and pads and I don't love that idea.

If I do the job myself, is there anything speciality I need other than the Brake piston tool? A specific triple square socket? I am also seeing conflicting comments on whether or not something special needs to be done with the electronic parking break. I tried searching for videos, but couldn't find a complete brake/rotor job on this vehicle (the best I could find was the ECS tuning video on a 2019 GLI)

Also, my car through the P0456 code, EVAP System: Very Small Leak Detected. Gas cap looks good. Since the car is still under warranty (I think), should I just take it into the dealership and let them sort it out?

Appreciate any help!