I've given up on Yahoo! Chess - too much cheaters and lag. I tried
signing up for FICS, but they apparently don't welcome Gmail users. (My
ISP doesn't offer e-mail, and I'm a minor, so I can't pay for e-mail.)

Create a mail account at sify.com (http://www.sify.com/). It is free.
Try to register at FICS using the same