Consider checking out this fellow's project. He's making an e-ink text editor: https://www.youtube.com/playlist?list=PL5jL92TrQ803IKtdFwmUC...

Oh yeah I’m subscribed to that channel and have been following along. That has some characteristics I’m interested in, but using my own hardware lets me make different decisions, like adding the leap keys I mentioned, and use full sized keys.