Guitar pedals are extremely simple to breadboard if you know electronics. Drive is "just" one or many transistors amplifying the signal out of the guitar. I haven't looked at what delay would take

I can make a circuit work sometimes but I don't have the knowledge to debug my errors.

Edit: https://www.premierguitar.com/diy/pedal-projects/how-to-build-a-delay-pedal-kit

Delay looks hard. I'm starting to play with digital pedal stuff and that is just software, so I may try that instead.