Mel, for coming right out of school it's pretty impressive you're doing so much writing straight out of the gate. KEEP IT UP!
Now to the serious bit.. To be honest, I've only really flirted with the life of a freelancer, making what now seems to be a half-hearted attempt at it after I got laid off in 2009. But bills came up pretty quick, so I had to scramble to find work that would pay and pay me with some sort of frequency.. Whether it was odd building jobs, or tattoo shop, or whatever. It usually meant the only time for writing I had was nights and weekends, which worked out ok, but the whole concept of getting paid for your work seemed like a foreign concept to all these people, most of whom were on a salary.
I've had to harass some magazines for the better part of a year on invoices though it seems pretty evenly split between those that cut checks on time vs. late. (I tried the whole "Net 30" thing but apparently that doesn't fly in the magazine publishing world.) For me, I figured out that I don't make up that small percentage that's got that hustler mentality (as in the drive, not the magazine) and can turn freelancing into something new and unique, and turn that into more of a career. In my experience it was impossible to pay the rent by doing freelance tattoo writing alone. So you may need to prepare yourself for working that day job a little longer than you might have hoped.
But it sounds like now for you is the perfect time to make a run at it! Sorry, didn't mean to put out this burst of negativity, but I found it really tough. Sounds like you've already got some good relationships going, so keep em up and keep working! I'll PM you here in a second..