Mix and Master

I wrote and produced this at a young age love my song can you make it better? Would love to bang my track in my Jeep got a system, can you help me?

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