Seriously... You made a very big mistake. Even if you're a total newbie you should know that you don't sign contracts about stuff you don't know... If you're in a bank, and the manager gives you a pen and a paper you first read the paper so then you decide if you'll sign, it looks like you just didn't read the agreement, I really don't understand. Depending of what deal you've made, you'll be stuck with your "clients" for the rest of your life... If you don't know something, go to someone who knows. Ask a friend, a teacher, a FORUM for christ sake. Don't get yourself into one situation like this never again. The best choice for you now is to sit down with your clients and talk them to adjust your contract agreement. This is serious and you can be starting your carreer with problems that can mark you for life.... Best of luck!