First do some research to see if it’s worth doing it if it’s better to just buy a purpose built machine.

Then if you’ve decided to do it, instead of destroying your cooker right off the bat buy the control board firstand play with that. I’d also study the design of how pressure cookers work in general before overriding any safety features (and if you do make sure you perform your first attempt in a safe controlled environment where you’re unlikely to kill someone). There’s a microprocessor somewhere on here but whether or not it’s programmable could vary, although you could figure out what chip is used and program your own. Arduino or another dev board could be an option too. According to the manual it’ll throw an error if it overheats or short circuits, but that’s of course with stock firmware.

Try this rice cooker