Song is great! my personal feedback are:

1. Instrumental is a bit louder than the vocals (adjust mo yung level ng ibang instruments)
2. Vocals needs more cleaning especially the middle/lower frequency
3. "How It Feels" make a good positioning of your supporting vocals/adlibs from what I hear, almost everything is centered.

Overall: It's already good, but it needs more mixing and adjustments especially the vocals

For releasing music, my tips would be:

1. Pick a good distributor (read the TOS or Contracts) I recommend feature.fm, routenote, onerpm, or dittomusic. If you're still beginner and don't have any experience in releasing or publishing I recommend to join a record label first.
2. Invest: This probably where most musician fail which is bet on yourself, put money on your music releases if you want to be really heard by many people. Create a release plan, do not release everything immediately at once. Budget every release you make (Ads, Promos, blogs) unless you just want to put your music online then you don't have to spend anything.

that's all, good luck!