Contribute Code to Git

Hello,
    I am Alangi Derick Ndimnain, a third year computer engineering student, 
University of Buea. I have been using git on many of my projects and also 
GitHub(online version) to do my version control on most of my projects. I 
always wondered how thing usually happen in the background so i decided to 
contribute code and fix bugs(if any) :) on the version control system.
    I will like to have some advices and also start working on the system and 
also legally make myself part of this mailing list so i can get to talk with 
other developers. I am proficient in C and i wish to contribute.
    
Thanks and will be waiting for help or comments.