Even as a fairly confident nvim user, I still use and recommend <https://github.com/folke/which-key.nvim>

Even as a devoutember of the church of emacs I couldn't live without the emacs version of which-key [1]

[1] I was going to link to a repo, but I just learned that which-key is included in Emacs out of the box.

This is really cool! After entering the software field, I felt uncomfortable not having a sense of relative size while working with digital storage units. Piece of mind was achieved after sitting down and mapping the units (Gb, Mb, etc) to common artifacts(audio file, plain text, database).

I've been planning forever to do something similar with length, duration, power, etc.

That's basically what we're doing! I'd be curious if it helps you. Send me an email if you wind up listening to or reading anything from the site.