Step one: learn the name of the language?

Just try to be very very slightly above average. That should do it. Don't go too far or you'll get a B-.

(I'm sorry. I couldn't resist.)

https://www.learncpp.com/ is quite good iirc

I learned by watching a bunch of cppcon videos, reading cppreference, and writing a lot of programs. Learning how to understand the error messages is also really important

W3 schools and geeks for geeks aren't bad for the basics. Get an ad blocker though or a membership.