Have you checked out the Ultimate Additional Japanese Resources List? It’s so enormous, it can be a bit difficult to sift through, though…
For additional listening practice to go along with the Genki lessons, I use mykikitori.com. Also, I don’t know if you’ve seen any of the free Japanese kids worksheets online (e.g. happylilac.com, print-kids.net), but I like them, I think they’re pretty fun and cute.
Also, we’d love to have you join the discord server (link in OP), we can do voice chat there.
btw, what’s the farthest you’ve gotten in Genki previously?