Benzetacil

Hello Everybody!! I’m new here, so i think is better begin with an introduction : ) My name is Alex. I'm from Brazil (São Paulo), and I will start university in Computer Science. Searching for RTS games I Found 0 A.D. a few months ago. I really liked the game and when I saw the game is open source and anyone could help i thought that could be a great place to learn more about game programming and how works a big project. I downloaded the code and opened with visual studio. but it's hard to begin from zero modify the code. where can I found a documentation or tips to help me? what I need to know before try to help? I know openGL is important so where can i learn more about? sorry if I made silly questions, and sorry for my english mistakes.