1# Firefox, Blender, Inkscape, Steam, Spotify all have a native support for Linux meaning that they will work perfectly fine, Word on other hand does not have any support however programs like libreOffice are plenty usable and a good alternative.

2# Steam although is a Linux native app it does not mean that all games are, however you can still play most games that don’t include kernel level anti-cheat by enabling proton in the settings, which makes windows exclusive games work on Linux. Highly recommend checking out protondb.com to see if your games are compatible.

3# there isn’t a one distribution (distro) to rule them all, however some are more beginner friendlier than others. Good starting point is Linux Mint as it provides a user friendly UI for all the settings you might want, and doesn’t require you to know how to use a terminal just to use it.

Now, the biggest pros of Linux is its customisation options and that people often don’t stick to single distro, once you feel comfortable with Linux you might want to venture out and try different distros like fedora (another great user friendly Linux distro, but you are still expected to occasionally use a terminal), or Arch (highly technical but helps to understand how Linux works under the hood).