I've been working on my own cars for years and have also worked in a few garages including a classic car restorers but even I still need help with things & have paid other people to do jobs I'd rather not tackle myself or on my own.
Don't worry about it as at least you're willing to have a go which is more than some people will do.
Any problems or questions just ask on here and I'm sure you'll get some help with future projects if you get stuck.