is a website on wordpress user friendly?

[Mark]

designed for someone who's really bad with computers and technical things?
i tried having a website on wix, and it was very hard to change text in a page that already published, or add a page. how easy is a wordpress website?
and what if i get a free web on wordpress and free domain, and then sell cats food from my web? maybe because it's a free website, they dont allow anyone to make money on it, to use it for selling purpose? i'm not talking about placing ads, because i dont even want to place ads. it's never been my intention, just sell something off the web, that's all.