I would recommend functional programming, it definitely gets the brain working and will broaden your horizons.
If you are interested, we are working on an OSS programming language compiler in Haskell, and we are looking for contributors :) https://github.com/wasp-lang/wasp
Go and proceed where your heart leads you. Just dive in.
I can only speak of myself, but if you are interested in security and haven't gave Electron a try, I've written an open source template that could be improved upon: https://github.com/reZach/secure-electron-template
Oh, and be sure to cover your mouth if you cough! (And politely yell at people who cough in their hands :) )
