The tutorial I've been following only covers research listslike this; that operate entirely off the UI that was already established within the framework, but what I'm trying to do is set up a research tree with a custom graphic; I already have the visual graphics of the tree.
This is a non functional prototype made in Figma of what I want it to look like;

You hover the pointer over a square and it displays the skill. Click (what I presume will be an invisible UI button) and it asks you if you want to learn it. I just have no idea how to actually...implement this after trying for some time to kind of follow the tutorial on the site.
This is currently what it looks like in Ork. Everything here is currently nonfunctional, but what I want to do is when the player clicks on a square, a dialogue comes up that asks them if they want to learn the skill associated. as you can see, there are 3 separate trees, and all skills have to be learned in order from left to right. As noted above, what I was thinking of is having an invisible UI button over the squares that act as the research items.

But I'm not sure on the breakdown of how I set that up.