Yes you'll fuck things up. Don't keep anything remotely important on it and screw around with it. That's how you learn. Blow your install away intentionally, try a different distribution the next time. There's a lot more variability between distros, and more customizability compared to Windows too.
If you want to learn something new and different anyway. It's definitely not like Windows except at the most surface level; you can get by in the GUI for almost everything until something goes wrong, but that's exactly when you want to have been learning cmdline stuff, so you can try to salvage it.
Yeah I've felt that way for a long time. It's done all that I need and more since about 2003.