Im thinking of starting a website? (Read inside please!)?

So im thinking of starting a website....... But i want it to be a buisness type website.... Like selling clothes,toyd,and things like that for Animals. I DO know how to knit very well and im not very good at crocheting but i know how to (a little) So do u think that i could pull off a selling website? What would i have to do to start one?