How to start an online store?

Hi everyone, this is actually my first post on the forum and the reason I am writing here because I want to start an online store for selling clothes. I do have the idea as to how to build it but there are a few questions which are really bugging me and I dont have experience with that. Any online clothing store owners here?

We’re knitters and/or crocheters. Ask us about yarn, needles, hooks and you get our attention.