Most important thing: get a good soldering station from the start.
Any station you buy should have, at minimum:
- Adjustable temperature (analog or digital is fine)
- Dock and sponge for iron
- Heavy duty, heat resistant cable
- Fine chisel tip
- 50 Watts or better
I'd be leery of anything that costs less than $50 new. I bought a Weller WES51 years ago and it improved my soldering more than any primer on technique ever did. You don't have to go absolutely nuts here, but do NOT start with some cheap stick soldering iron with no temperature control. You'll drive yourself insane.
After you've invested in a good soldering station, you want to get the following at minimum:
- A nice, thin gauge (.032") 60/40 rosin core solder.
- Flux
- Suction solder removal tool
- Some braided solder wick (do NOT cheap out and get the lowest priced wich you can find, there's a huge variance in quality here)
- Flush cutters
- Needle nose pliers
- You SHOULD wear goggles.
Also nice to have, but depending on the job you might not immediately need:
- A good multimeter
- A "helping hands" setup to hold your work piece in place. I like the ones which are magnetic and allow you to reposition the hands.
- Magnification
- Insulated tools for poking around safely.
- Flux cleaner
Finally, you need to have a good environment to work in. This means adequate ventilation, decent lighting, and a large workspace which you don't mind getting solder in. If you can position yourself near a window or somewhere with good circulation that's probably acceptable. A fume hood or something similar is better, but not strictly necessary for a hobbyist who only does 1-2 jobs a year tops.
Once you have what you need, THEN start watching tutorials. With the proper tools you'll pick up the basic technique in no time. Keyboards are a good place to start because you have tons of identical switches which usually only go in one way. The best way to get good at something is with repetition.