It's not as hard as you think to start, but it takes forever. I used to wait until stuff broke and needed replacing. I'd open it up and "try to fix it" knowing that I was going to break it worse and that I was buying a new one anyways. Looked up a lot of videos on YouTube.
Little by little I leaned to take things apart and put them back together without breaking them worse (mostly). Then I started to buy cheap Amazon spare parts to try to fix things without taking a big risk. Again I figured if I could buy a few more months of use it would be worth the risk.
After about 20 years I have a lot more confidence and have a pretty good success rate for household repairs and probably 30% for broken appliances. Sometimes shit is irreparably fucked, sometimes it's still beyond my skill. When I fix something I usually get a couple of extra years out of it. It's a nice hobby, save a few bucks sometimes. Better than spending an afternoon on the Internet.
Yeah. Young adults are going to have sex.
They can have sex in the safe home where they live. Or they can have sex in less safe places like parties, frat houses, in cars where they can collect a public indecency charge, etc...
That's the choice you get to make as a parent.