revisit your levels first. i always do my levels immediately after tracking and then do my mixing. it makes things sit better.
adjust your velocities so the drums sound less fake. the guitar playing is pretty sloppy too so its kinda hard to interpret whats going on with the guitar. but it has too much low mids. put a high pass at around 100 and let the bass carry the low end. if there is a bass i cant hear it.