Tips from personal experience, from someone enthusiastic about free software:
* Do you know, or do you expect to meet, people who use Microsoft Word? If the answer is 'yes', Libreoffice is only going to end in tears. Just forget you ever heard that name. Trust me on this.
* If you're a windows user who wants to try out Linux, install Linux Mint and install the app "window list with app grouping". That's the closest you're going to get to a familiar UI experience. Also, learn how to use Google, or you have zero chances of emerging from the experience with your sanity intact.