Congratulations on starting! I am about 14 years in to my PCB design journey and having an absolute blast with it. I am also not formally trained but that hasn'

Congratulations on starting! I am about 14 years in to my PCB design journey and having an absolute blast with it. I am also not formally trained but that hasn't stopped me from continuing to learn and making some pretty complex boards. The biggest thing I learned lately was, if your board is open source, find some nice person online (twitter, mastodon, reddit, etc) who is willing to offer design review for you. I have learned SO MUCH from having a professional critique my boards. Also Phil's Lab is excellent! My favorite resource for learning advanced concepts. Just ignore his shilling for Altium and stick with Kicad (which he more recently has been exploring). Kicad is an incredible tool. Learning Altium has value if you want to work at a shop that uses Altium, but Kicad is really an excellent tool that is very accessible. I do robotics so I do software, mechanical design, welding and fabrication, and PCB design. PCB design is by far my favorite of all these fields!