[crispinb]

Bear in mind if you're a programmer that touted learning resources that don't include symbol keys are of limited use. There are many speedy human-language typists who have to peer at the keyboard every time they encounter a tilde or Fn key.

I'd also add: only make this a priority if you don't already touch type. If you do, your speed will be adequate, and you'll gain more by adding higher-level tools to your arsenal (refactoring, structural editing, etc). It's sad that in 2020 we're still largely 'editing text' when programming, but careful use of IntelliJ or emacs (amongst others) can often lift the mechanics up a conceptual notch or three.