There are several covens that focus in developing skills in general magick. There are also more specialized covens you could join if they match your interests.
As for your dream, here's what I think. Source dreammoods.com
To dream of black magic implies that you have obtained your wishes and wants through underhanded tricks. It also symbolizes deception, evil and treachery.
To dream that you can start fire with your hands represents anger that you are trying to repress. You have difficulty expressing yourself and tend to overreact.
To dream that you have wings suggest new found freedom. You are on the right track and are soaring to success without limitations. Alternatively, the dream means that you are trying to escape from a difficult situation.
To dream that you are restrained indicates that you are holding yourself back and not fully expressing yourself. Perhaps you are feeling helpless in some situation. The dream may also be a reflection of the actual state of your body, known as REM paralysis.