The best place to get started is to attend comic book conventions and show off your work to as many people as possible. It's essential to network with various professional artists in the industry.
Also, I would suggest taking art classes because you'd have to know everything about what goes into a drawing. It's actually much more complicated than I realized so definitely look into taking art classes. Still-life, landscape, sculpting, shadowing, painting, inking, shading, learn anything and everything art related.