I have similar types of bindings. I just found a keyboard that can use ZMK. There's quite a few out there.

ZMK (or it's free software cousin QMK) are super flexible and you can create lots of custom behaviors for keys (tap/hold behaviors, double press, layering, etc...). It takes some time and effort to learn how to set it all up. Some of the more complicated behaviors require using their dsl for mapping the keys instead of their GUI editor. Considering the ridiculous amount of hours I spend at my computer using a keyboard, I felt it was worth the investment in learning.