I think it helps to have a lot of technical expertise yourself on how to set up a website. Having a good website is a huge piece of setting up a successful online business. A lot of people pay to have this done but a lot of those websites are not very good.
Maybe your daughter could start with eBay? There is a way to set up your own store on eBay. Seems to me that would be a reasonable transition to setting up an independent website. Not sure what the costs involved are, though. That would be part of the research necessary to develop a business plan.