Begin by choosing a style you want to learn.Then pick a piece to work on that is only a slight challenge for you (not too hard, not too easy).
Learn it and play it so much that it becomes second-nature.
Play it with other musicians if possible, or perform it for a friend or family member.
Repeat.
If you choose pieces that aren’t too hard for you at any given moment, learn them thoroughly, and supplement your practicing with something social, like jamming with others or live performance, you’ll go far!
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