Your story is very inspiring, thank you for sharing this!
I’m working in the office 8 hours per day and only at evening i can compose music. For now i can’t leave the day job becouse i have family and my sales on AJ are like 20 licenses per month. So it would be a huge risk for me which i can’t take. But i hope some day it will be possible to me, to work just as a freelancer as you wrote. I remember when i started composing for AJ, it was one year ago, my daughter was 3 months old and i needed some extra money to hire a babysitter for her. Sales were very dissapointing at the start, but i worked hard, i got up an hour earlier to write music and i achieved my goal few months ago. I have to keep sales at this level but for now i can handle it.
I wish you big sales! Hard work and this will be a matter of time 
Cheers!