Don’t install on your main rig over your main hard drive. Don’t obliterate your windows drive, that will ease a lot of the intimidation, knowing you can always go back. Getting a cheep laptop or thin client to try distros out on will elevate that intimidation as well.
Start with what you have heard of and have been recommended repeatedly, Mint, popOS, Ubuntu, all great distros to learn on, have great documentation.
Also, read the docs. They are dry and long, but will always have the solution.