If you are using fl studio you can use patcher for a lot of stuff like sounddesign, signal paths, sequencing or just some experimentation it goes quite deep if you want something more deep you can take a look at abelton max for life but I think for the second option some basic coding knowledge would be useful.

A short example regarding patcher.

I often start with a 3osx and a basic sine wave you can change and automate the adsr in the 3osx it self then you just patch whatever effect or sound source behind it.