Dungeon-crawler/Diablo-style status bars?

So I’m trying to make an HP/mana bar in my game similar to this (and to what Diablo has), but that item apparently isn’t on sale anymore. I also currently have the User Interface Kit but the guy’s posted zero tutorials or documentation, and trying to implement it has been a huge pain I’d rather avoid. I’ve tried taking the material he used and just doing it from zero, but I can’t find any information on how to make the progress bar’s material change or be affected from the UI by the player’s health.
Any help is appreciated.

I made this some time ago:

Hope you can get it to work; sadly, I do not have the assets anymore.

Can I kiss you? This actually helped me a TON with getting the material moving, thank you <3

For anyone having the same problem, the picture to my answer is way at the bottom, where he plugs in “Create Dynamic Material Instance” into Event Construct, and promotes it. At “Set Scalar Parameter Value”, you’re supposed to put the exact name of the parameter in your material that you want to change (in my case, the fill was called “percentage”, so I put that in “parameter name”).