Python is very slow and hogs memory. Sure if you call a function that does lots of work like parsing a file, it turns it into c calls, but most of your code isn't like that. It's meant to be a scripting language.
If you want to learn c++ then learn it, you should have a fairly easy time since you already can program in python, and you can even use python from within c++.
Grab yourself 2 books. 1 for a introduction/tutorial type book and the other should be a reference type book. Also add to your browser favorites/bookmarks sites like
Possible intro book
Possible c++11 reference book