As a musician, you would earn money from playing music of any style from rock, pop or indie to jazz or folk or electronic genres. You could perform as part of a band, as a solo artist, or as a session or backing musician.
As a musician you would need to be creative. You would need the confidence to create an individual style. You would also need motivation and determination.
You will need a good level of musical ability as a singer or on your chosen instrument. Many musicians take music lessons, in colleges or through private music teachers.
Business and marketing knowledge will be required to get yourself noticed and to move projects forward.