Thanks a lot for the kind words! I think you should definitely learn Python - it's a very versatile language, but for the full-stack I would recommend mastering JavaScript instead.
As for me - I've been coding in Python at school for a while now (I'm a data science major) but I haven't really had any experience with the full-stack so I wanted to take this as a learning opportunity for me. In total, it took me a week to build the whole site - the relatively quick timeline is probably because I treated it as a personal hackathon with a one-week deadline.