A long time ago I learned "as de guía", let me see the translation... bowline. It's the only knot I've ever needed. I know there are a lot of specialized knots for different situations. But this one in particular is like a swiss army knife. Clothes lines, anything to lift, packaging...
If I needed something more specific I'd be happy to learn more.
[1] https://www.animatedknots.com/two-half-hitches-knot
Best advice for learning: get a convenient (2-4' depending on knots) piece of rope, thin enough to be portable, thick enough to be manageable, and practice tying knots as a fidget spinner
Initially it will be tough and require thought, but for a lot of the patterns you can do it without looking after a bit of practice. And repetition breeds memory.
I find I use the midshipman’s knot at least as frequently. It seems I’m always tying knots in lines that need to be adjusted: Boat covers, awnings, tent ropes, etc.
There are 3 (that I know of) different ways to tie it that are worth learning as a next step. One of them lets you prepare it so you can quickly tie it around something and have it invert on itself to form. Another technique actually revels that the bowline is the same as a sheet bend, just using one line folded back on itself to make a loop instead of 2 lines joined. So that’s a freebie (and the sheet bend is a great knot).
It’s super versatile.
I never use the reef knot anymore. Lost a dingy in Greece because I trusted it for about 5 minutes. I find it works itself free really easily.
Hmmm... I'll keep that in mind. Thanks.