Looking to see the difference a proper mix/master would make to my music

Ive been producing for a while but have yet to attempt the mix and master process. Would like to see the difference it would make to my music

Additional info:
The song has somewhere between 10 and 30 tracks recorded that need mixing. The tracks are cleaned, tuned, and and the song is ready to be mixed. I'll need you to master it too if possible. I'm interested in working with a very experienced mixer. I don't have a hard deadline for this. Check out the song I attached. I'm an indie artist.