For us keyboard geeks, there is monkeytype: https://monkeytype.com/
I was always in the camp that believed that the keyboard was always faster than mouse for complex workflows.
Then a couple of weeks ago I spent most of a day in a hospital emergency room with someone, and couldn't believe the way those E.R. nurses fly through the menus and options in Epic using just a mouse.
I'm now closer to believing that "muscle memory is muscle memory." But I suspect it only works if the windows appear in the exact same place all the time.
Replacing software with poor keyboard navigation support with better, more modern alternatives will literally do 10x more for your productivity than faster mouse skills.
Mouse aim training has to be the saddest way to improve productivity I've seen anyone suggest.