[HELP] Creating Hotbar/Ability Bar With GAS(Gameplay Ability System)

hi so ive been searching for ways to create hotbar using GAS for a while now and want to ask for guidance.what i want to do is create action bar with ability window where u can drag the ability onto the bar like in most mmorpg there are skilltree where u can drag and drop onto the hotbar.

have anyone do something similiar to this and willing to share how you manage to get it working

anyone can still help me with this?