How can I create top down mouse-driven aiming? (Crosshair follows cursor, fires projectiles at cursor location)

How about this for a twist. I bought L Newton’s ATS which is awesome, but it’s a lot more than I want actually. I want to be able to click on one enemy AI (Select it), and shoot at him with my hero character. Is the method above a good starting point or am I way off??

in advance, and if you’re reading this, great stuff!