Even though I had studied C++ in 11th, it was quite new to me too when it was introduced. But let me tell you, it is super easy (just a lotta logic is involved). I wonder what the Computer Engineering wale cry about so much.
Okay, let me tell you where to start off and I know you'll get it off from there. Try doing all the loops well - the for loop (most important), if loop, while and do-while loops.
I can (almost) assure you that once you have them at your fingertips, everything else will seem like a piece of cake to you. I swear!
And yeah, I forgot - Matrices - very important.