Same I'd like to be more confident fixing things on my own and I might take some classes myself. Changing a tire is actually quite a lot more than most people these days know how to do, so be proud of yourself . I'd suggest watching YouTube videos and getting a general idea how the cars systems work together to provide movement and then focus on how those systems work. It might be a little easier if you understand concept before getting to specifics. Start with changing your own oil and replacing filters . You can then graduate to tackling smaller jobs and before you know it you'll be much more comfortable with it all. Youtube , Chilton's or Haynes manual( check your library, they might set you up with a account to access chilton's or direct you to their in house resources), your own car manual, and the sticker on the side of your door will be great resources for you to be able to do the work on your own. There is a code that will tell you what kind of parts your car is equipped with, so you can check your manual and see what fluid is needed. Oh and make friends with a mechanic who you can bounce ideas off of or ask for a quick favor to use a high power tool.( Always tip after with money or beer. Call to talk when they are sort of in business hours but when they are not busy)

For electrical work I'd say if something in your car just went out no precursor and it's a system like both headlights, or all the running lights, the horn only. That kind of thing is probably a blown fuse, in the manual you can look up which one it is. Pull it and replace with a working fuse. Sometimes it fixes it and your done.

Example - in my car I don't have a working front washer pump. But my back pump works. - it's probably not the fuse since the pumps are right next to each other on the washer fluid tank and probably are on the same line that goes to the one fuse.

What else could it be that's easier to check than just replacing everything. Check your line from the pump to the windshield. I grabbed a bike pump and squirted air both ways . No clog. So bad pump. I'm going to replace it when I get a chance to use the garage and hopefully that fixes the issue.

Make an account on the car's forum, there are a lot of people who are willing to help you trouble shoot problems there. Quick tip don't just trust any youtuber. Check the comments to see if the person massively screwed up. You can trust 1A auto and Ford tech Maculoco. These are experts and they give you info that leads you to believe they are experts( they know history of changing parts of the car, torque specs).

What feels like a long time ago I also wanted to get a small sport cycle and mount it to the front of the truck and go live in my rv. I Hope you get that cycle😊.

Edit: Oh and if you get more into working on your car get a code reader. Helps to diagnose a range of issues from the cars sensors.