Hey, for your first question. Do you mean saving them with the save system? I have not experimented with that but I guess once you get the hang of how stuff gets added to the actionbar, you can save the state of the actionbar and then build it from the begining on load.
For starting with an action bar - That shouldn’t be too hard. Just check how stuff is added in the actionbar (when the drop operation is called (it’s actually just a single event dispatcher with the slot number and the spell as an input). Then just call those events in an “Event Begin” node (after a short delay for everything to be initialized)! Everything should work right away!