I'm not YET a Linux user--getting closer and closer with every update, and I think it's going to be on my next computer no matter what--so I hope that Linux users will correct me if I get anything wrong, but my understanding is that there are a few versions. Some of them require you to be a power user who knows a lot of programming; others are designed to be more user-friendly. There are versions of it you do pay money for, but I think most are free.
If you ask Google about the best type of Linux to install, though, it will show you a bunch of articles reviewing and ranking the different versions, and ease of use is one of the thing they talk about. (Generally it looks like the more user-friendly something is the less customizable it is, but there are still a lot of choices.) One version that people kept mentioning was Mint, but the last time I looked it up was a few months ago, so your own research might turn up something even better or more suitable for your needs.