#1
What chords should i practice. I have a Chord chart in my room do i need to practice every single one of them or just the Major and Minor chords.
#2
Just start with the simples like A B C D E F G and switching between them and then move on the minors.
#4
Chords and scales are closely interrelated. Every chord in a particular key is made by selecting the correct notes of that key's Major scale (some with minor alterations).

If you know your Major scale patterns, all 7 of them, you should be able to form any chord anywhere on the fretboard without having memorized all of those chord diagrams hanging on your wall. There's a simple set of formulas that allow you to do this. Check out these links:

www.reallylearnguitar.com/majscalestutorial.htm and learn the scale notes by their scale degree (the number of the note in the scale).

www.reallylearnguitar.com/chordformulas.htm and learn the simple formulas. NO MORE MEMORIZING CHORD DIAGRAMS!

www.reallylearnguitar.com/triadstutorial.htm and learn all the triads (3-note chords).

www.reallylearnguitar.com/7thchords1tutorial.htm and www.reallylearnguitar.com/7thchords2tutorial.htm and learn about 7th chords (4-note chords).

And finally www.reallylearnguitar.com/survivaltutorial.htm and learn all the chord forms that will get you through a jam session, no matter what.

Learn these few simple things and you'll be teaching everyone else. Good luck!
Jam On!
#5
Practice all of them. If some are hard, spend maybe 10 minutes switching from it to other chords.
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