I recommend taking a look at https://roadmap.sh/. It’s not a course, it’s a website with several “roadmaps” for learning languages or specific fields. There’s plenty of docs and it’s easy to follow!
You should look into curl https://curl.se/
Company was a shitshow, new features or changes were expected immediately, so we got used to work directly on prod. I told him to test anything on a dummy DB and show me before we submit it, but he got around it when I wasn’t looking. The security tools were garbage, I wasn’t allowed to change permissions.