Better programming skills. I've been programming for years, i just suck :D Today, i submitted my first proper PR to an FOSS project (https://codeberg.org/lemshare/lemshare/pulls/4) and i just wrote my first matrix bot for a room for instance admins. It converts all links to use lemmyverse.link, as a convenience.
I have no idea if they like it or not, but i'm personally proud of what i did. The code for both is pretty hacky.
Besides that? Learning latin and ukrainian :)