Not bad for no formal training.
If automotive design is something you wanted to pursue, you would probably have to attend a school such as Art Center or CCS that specializes in it. They are very expensive and would take a few years (sorry, don’t know the exact details). After that, you would still have no guarantee of finding a transportation design job (it’s a very competitive industry), but of course you would be in a much better position to do so.
Alternatively, you might want to look into a more general design education, such as ID. This might provide you with more options and job prospects.
R