A few comments off the top of my head. I'm assuming you're going for an Anjunadeep type sound based on the tags.
- I like the overall melody and vibe. It almost sounds more like a rock instrumental sometimes than a dance track.
-Biggest problem: The kick is weak. I would turn its volume up and sidechain the bass and possibly some of the other tracks to the kick. Maybe use a different kick sample with more low-end thump.
- The bass for the first half is weak and subby. I actually like it as a sub bass but it needs something in the mid-bass range. The mid bass that appears after the drop is much better but it maybe is a bit too loud. The higher lead sounds get lost once that one appears.
- The arpeggio that starts at the beginning gets monotonous before the drop
- Sometimes I hear notes that clash with each other musically. Example: 2:50-2:59
- The clap (snap?) sound after the drop is lost in the mix. The bongos that start at 3:20 end up getting the focus, and in this kind of music those should be in the background with the kick and snare/clap out front.
- I don't think you're using very much reverb - the lead sounds could use some.
Keep working on it, it definitely has potential! As for what to focus on for learning, I'd say the best thing is to get a couple of reference tracks that have a sound you'd like to reach and work on getting each part of your mix closer to that. If you haven't studied EQ and sidechaining those two would definitely help get a better mix.
