Making games. What to do after learning C++

Hi, I've just finished learning C++ and SDL. But... I don't think i can make any good 2D game like that. I've heard about desing patters, and OOP but they are too hard for noob like me.

>>10
This is the main loop:


while (!finished) {
    update(): /* Get input and change game state */
    render(); /* Print changes to screen */
    usleep(1000/fps);
}