Welcome to the site Matthew, I'm glad you're enjoying your studies. First tip... it takes a couple of months to achieve single notes consistently, so give it time (commonly a couple weeks to get something you're close to happy with). Also watch Hob Boslod's lessons (https://www.bluesharmonica.com/contributor/hob_bosold), I spend a lot of time with him on his embouchure.
Welcome to the site Matthew, I'm glad you're enjoying your studies. First tip... it takes a couple of months to achieve single notes consistently, so give it time (commonly a couple weeks to get something you're close to happy with). Also watch Hob Boslod's lessons (https://www.bluesharmonica.com/contributor/hob_bosold), I spend a lot of time with him on his embouchure.