When I was just starting out like you, I played a system as black with g6, Bg7, d6, Nf6, 0-0, etc. A King's Indian or Modern Defense. Now that I'm a lot higher rated than that, I know that those two openings are theoretically very different. But you should absolutely not study opening theory right now, and under 1000, it doesn't matter one bit because no one knows theory anyway. Just play that from both sides (as white go Nf3, g3, Bg2, d3, 0-0 and maybe later try to build up to play e4) and spend your study time on the following two things (and those two things only until you break 1000): tactics and endgames.
Good ACTIVE openings against d4 pawn
Just play stuff you like, objective better or worse isn't that relevant at our level, I myself have taken a liking to the Benoni defense because it's an active defense against d4.
I'm fairly new to chess and feel myself kind of stuck in terms of awareness of the main line play (and the idea's that associate with that). I'm just looking for simple, and cool :) openers to actively play against this. When I took the chess personality test i scored either champion or barbarian (reference point for my playstyle). I took the test 5 times.