- I started using Linux this year after switching from Windows. I've learnt a lot about system admin and how operating systems work but still have a long away to go

- I've started to formalize my programming knowledge by self studying 'Structure and Interpretation of Computer Programs'. I try to do most of the exercises. Its a tough book but well worth it and it has really crystallized my knowledge of programming

- I've also started learning the basics of networking

Non-technical:

- I've learnt that my job (as a dev) is not as technical or as interesting as I always hoped, and thats okay. I've learned to channel my technical interests through my side projects and let work be work

- I've learnt to relax and to not stress out about learning programming/computer related things. I switched to a career in software development after working as a manufacturing engineer and always thought I had to "catch up". However I realized I'm not actually that far behind as computing is a deep field and imo is best learned hands on, which from what I can tell university's don't do. I thought a CS degree from a university is what I missed out on, but I've proven to myself that I can teach myself better than a university can (I have a degree in industrial engineering and imo the university I went to was low quality and the experience there lowered my opinion of universities). So I do my side projects and self studies and I stay patient knowing that I'm really in the same place as a someone who studied CS. I self study the theoretical knowledge and apply it in my side projects