Given the usage you describe, I'd suggest
Linux Mint. It's a nice, full-featured distro that goes out of its way to have its default menus etc. easy for new Linux users to navigate without insulting them by trying look like Windows. And it works really really well.
I've run it myself on various machines for several years and, when I set up Linux computers to give to my kids (who aren't kids any more), it's the distro I chose.
If you use the LQ Search to search for something like "best distro new user" you will find many threads on this topic; they may contain information you will find useful. A web search for a similar search string will turn up many articles and blog posts; some of them may even be useful.