Hi Mati, lots of us beginners (and some who have played for a long time) struggle with this! Here are a couple discussion threads you can review: Pick Manipulation, Guitar Pick Issues, Pick Slipping Tips. (I searched using the terms “Pick slip”.) You’ll see folks talking about fancy picks - as a fellow beginner I encourage you to stay with the thinner picks Justin recommends. If you do choose to explore picks, I’d suggest starting with a variety pack like this one from Dunlop. If you can’t find the variety pack, you can use the contents as a guide for what picks to try.
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