Also looking for resources to learn how to make the designs (GDSII?). I have absolutely no clue what I'm doing here but I'm willing to sink about 1k into this little diversion while I'm looking for work.
I am currently an embedded software engineer and this appears to be the next level lower in the stack.
If you really want to go low, look up what's currently available in printed electronics. But you might have to do your own transistor layouts.