I’ve heard Base58 might be a good starting point? Looking at the website - they only have the 1 course for “beginners”. nostr:npub1rxysxnjkhrmqd3ey73dp9n5y5yvyzcs64acc9g0k2epcpwwyya4spvhnp8? 🤷🏽‍♂️ nostr:note1nxm42cjr9ktp3gt3qsnver5nr397hx96csyty7zhsr3nzrfaffsqeyudr4