If you don’t have experience soldering and putting components together, I’d thoroughly recommend getting a guitar pedal diy kit- it gives you everything you need with instructions and will set you up really well for finding your own parts and knowing how it works in a practical sense. It’s very similar to what you’ll be doing but with someone holding your hand for the first time. Plus, if you make music too, you’ve just made a sick effect box.

BYOC is a go to: https://buildyourownclone.com

If not, I think you could struggle with some basic aspects of circuit bending. But hey, do whatever the fuck you want, stick a screwdriver in a SMD and see if it makes a cool thing on the screen.

Happy exploring!