Unfortunately just reading about C++ isn't going to take you from beginner to expert, it's going to take a long time and a lot of coding.
With that said, there are a number of excellent resources out there to set you on your way :
Game Coding Complete : http://www.amazon.com/Game-Coding-Complete-Fourth-Edition/dp/1133776574
Your best bet is to start small. Give yourself a project to complete, and code, code code. Try making a pac-man game, an implementation of snake, pong or space invaders. The important thing is to practise actually writing code - as much as you can!