If i'm not a very good singer?

If you practice a lot and try very hard each time you go into one of your sessions, I guarantee you will have a great voice. It is all about motivating yourself and believing you can do something. The more positively you think and act, the more positive things start to happen around you or to you. Don't give up! I took singing lessons a few years back and I have improved greatly. They will teach you how to breath and extend your pitch and range. Just stay positive and open to what your teacher shows you.