^^ this is also great advice. If your string action is crippling high, you'll wind up with one of the issues I have to this day - you'll press too hard when you fret, note will be sharp. Plus, you'll be working way harder than you need to, causing finger / hand / wrist fatigue. If you want to learn how to properly set up a guitar, I'd suggest Dave's World Of Fun Stuff on YouTube. Go back to his older videos where he explains more, the newer ones he skips a lot of steps if you've never set up a guitar before