It's never been easier to literally talk to your Macbook thanks to MacWhisper but if you want to benefit most, maybe this video can help motivate you to go for a programmatic keyboard as well.
If you have a programmatic keyboard, you're free to map shortcuts/macros unto any key. The default for MacWhisper allows you to configure the Fn key for this, which is pretty good. But the real freedom is to put the behaviour exactly where you want it!