it is great that you have a goal. i hope you are being realistic about when you might be skilled enough to offer your things for sale, anywhere. ceramics is a huge field, handbuilding is a skill for making shapes from clay. before you get to any of the actual working, try your local library for some basic books. yes, most of the good ones were published many years ago. the basics do not change. do not start with a thin book showing how to do a particular style, that is for later on.
read many of the posts here re the kind of clay you might choose, the way you will turn that soft clay into hard items by firing, the kind of kiln you will use, whether your own or at a distant studio.
you are only taking the first half-step of a 1000 mile journey. it is worth it as you can see by the length of time many of us have been working with clay. good luck.