Ok first tuning. Buy a guitar tuner. That’s the best way to figure out the tuning part. When getting a note or chord, you want you finger to be right behind the fret wire/bar where when you push to strin into the fretboard your finger is touching the headstock side of the fret wire/bar. When learning to make a clean sounding note; you’ll have to play around with it as every guitar is setup slightly different. But the goal is to be able to make a clean and clear sounding note that rings out, with as little pressure as possible. You’re not trying to make the string touch the wood part of the fretboard, you are only trying make the string have a solid connection to the fret wire/bar. If you have to really bare down on the string to get it to touch the fret wire then your action is far to high.remember you don’t need to push the string all the way down into the wood. Play around with a single bit and start applying just a little pressure to the string while you pick it and keep adding more oresure until the note rings out; and that is exactly how much pressure you need to use. Then repeat the last but use two notes of the chord, then add the third all while trying to calculate the bare minimum of pressure needed to make the notes ring out clean and clear. I hope this helps. Please; Let me know if you have any other questions.