Your sound is great. You need to work on mixing and mastering the track. Making sure that none of your channels are exceeding -3dB and that your Master Channel never exceeds 0dB. You can use Compressors, Limiters, even EQs to fine tune your frequencies and control your volume. I'm not sure what DAW you use to make your tracks but I'd look up some vids on Mixing and Mastering Practices.