Does anyone know of any freelance video game reviewer tips or resources?

Currently I’m a QA tester at a large video game publisher, but I’ve been flirting with the idea of maybe putting my college degree to a little more work as a writer. I'm interested in exploring freelance video game writing, but I’m not sure where to start. I've never freelanced for anything.

Right now I’m putting together a small writing portfolio so that I can provide samples when the time is right. But to be honest, I’m not even sure how you secure a freelance job.

Would I just email a number of video game related sites, express my interest in writing reviews, and then provide some writing samples?

Also, does anyone know what you could expect to make as a freelancer? I understand it won’t be much, but then again, I don’t make a lot as a QA Tester, so it isn’t like I’ll miss the money.