Should I even try it?

is it possible knowing c++ to make bypass+hack?

It takes much more than knowledge of a programming language to make hacks.

Honestly, I would start out with the basics... No point in trying to create bypasses and/or hacks for no matter what if you don't understand the basics...

exactly, even he will learn something new and will start to think different about it

Learn how computers work, how memory works, how different stages are set and attributes distributed

learn c++ then learn reversing anti-cheats