I got this working using my only knowledge and common sense to make this working:
The incorrect version was this:
They both fired projectiles at the cursor, but the incorrect one had bugs and errors in, ending up it shooting in the wrong direction 90% of the time. The difference between the two tutorials was, one was done in a custom controller, which I didn’t want to make for one feature and the other was self made by me with help from the WTF is ConvertMouseLocationtoWorldSpace tutorial.
I got what I planned to produce, but not originally and now have an idea for a debuff. I still need to destroy the bullets on wall collisions, but apart from that, I am happy with what I produced with these tutorials.