How to learn C++ and how long does it take

Question

Hi everyone!'XD
I’ll be participating in a C++ programming competition. To be fr,I just started learning programming. The competition is in about 6 months, but there’s a chance I might have some even sooner so I need to learn as fast as possible.
Dear C++ lovers, this question is for you:
How long did it take you to learn to program in C++ like a pro, and what is the easiest and most effective way to learn it?

Any suggestions are truly welcome. Thank you in advance=D