I am not a professional, but this is how is how I replaced the factory radio with an aftermarket radio in my 2017 Honda Ridgeline RTL. I was able to maintain steering wheel controls, factory backup camera, and factory USB input. with no hard wiring, other than reverse wire.
All the parts I used are in the wiring diagram I used. See link below.

Link to my wiring diagram....
https://drive.google.com/file/d/1PLPQ...

HD 11 vs 12 https://drive.google.com/drive/folder...

Note: make sure you use Metra HD11 for antenna. Crutchfield had wrong one listed. I have communicated with them about changing it in their records.