TL;DR - Just go for it, you'll figure it out, but make sure you have a spare just in case.
I say throw all advice to the wind and just send it! (this is what the kids say, it means "go all out", "DO IT!" not "send it in"). I'm only half kidding. I have my dads old SLR which got me into this film photography mess and is my daily driver which I will only do the repairs it needs as soon as I have a different option, in case I break it. I also have a pile of cameras that are in different states of repair/disrepair because I buy basically any broken camera I come across just to see if I can fix it.
I was given a Minolta X-700 with a shutter that only opened halfway, producing half frame images. I found some ideas on YouTube about what might be the problem and since I didn't need the camera, I opened it up and replaced a couple of capacitors. It didn't fix the problem but it was broken in the same exact way it had been before! This was great news to me because it meant that I had not done any damage and I effectively did the repair I attempted (it was just the wrong repair). And under the hood of that camera was more circuitry and wiring than I ever imagined would be in a film camera.
I can't tell you how much it boosted my confidence! My next project was a CLA on a large format shutter and I tell ya what, when I got it all back together and it worked properly, I was over the moon.