Came across some old pictures the first circuit board I designed a few years back. This was a microphone amplifier that fit the inside of a 22mm stainless tube. I didn’t come up with the schematic, but used it to learn how to design an actual circuit board using EagleCAD. The board was then manufactured by (tin-something , its been a while) and arrived as blank PCBs. Everything was then hand soldered. Wish I had the completed product ( a Microphone for a recording studio) but not sure if that ever went in to production.