Honestly if you figured out lemmy you can figure out linux at least enough not to be a 95yo about it.
Use a distro that is both popular and good for beginners, like Fedora or it’s KDE spin, or Mint. There will be learning, there probably will be troubleshooting, you’re switching from something you’ve always been familiar with to a new thing, it is unavoidable. It’s like moving to Mexico, you’ll need to pick up at least a little Spanish. It’s really not as hard as people make it seem, most questions will be solved by searching the problem and pasting in a terminal command, but it’s good to learn what those commands do over time. It might benefit you to use the computer more often while learning if possible.