UE4 AOE Abilities

Guys i have been struggling with creating the AOE Abilities’ “Range/Indicator” thing…
Here’s how i want my system to work:
1-On the first key press an area based indicator appears within a certain range
2-On the Second key press the ability is applied at the selected spot
"Just like Paragon’s “Sparrow” Hail Of Arrows Ability*
Any ideas how to get this to work ?!
Thanks in advance…