Amnestic - Murder Suicide [Dark Drumstep ]Need mixing/mastering advice!

So I am becoming pretty happy with my music in general (the structure etc.) but I am a huge noob at mastering. So far I am just getting my head around EQing and balancing the volume of elements, but I still have a lot to learn (still don't know how to really utilize the limiter, compression, or fading, and have yet to learn to sidechain).

I want to know what, in your opinion, this track needs to have a somewhat professional sound (I know truly professional requires a studio etc., but I just want to get as close as I can).

I am trying to sort of make a list of what to learn, and apply as much as I can to this track.

Thanks for listening!
Bruv thats dark. Dont forget that whenit comes to mixing or compression, you're gonna need to get the volumes right in the mix, then any instruments that change volume just because they happen to peak that way, need compression to stop them peaking so much. There are many tutorials on youtube, look up the compressors associated with your daw. safe trails