Hmm. I don't really have any experience in stuff that low-level. If I contribute I'm thinking I would be probably making the apps for the OS itself? @lily might have experience in this, I think wrote a Wayland compositor I remember correctly. And about Slack, I don't have Slack but I do host my own Matrix instance, though Discord would be the easiest way to communicate w/ me.
Yay! Would you be interested in contributing to TetraOS and help us create a Wayland compositor?