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It took me about a month before my fingers could take more than 10 minutes. You’ll get there soon, have faith. You probably now have the initial superficial callus, but you really need a thicker layer of thick skin on the fingertips. That takes time. You will feel it grow. I find that playing shorter playing periods more often helps. Stop when it hurts and come back an hour later (if that’s possible with your schedule). If you’re only playing chords, try something from the song vault with flatpicking or fingerpicking, most people tend to press on the strings more when playing chords. Plus, you’re consistently putting pressure with all fingers simultaneously, whereas, with flatpicking, the fingers get small breathers in between.