okcupid.com is free and fun, has loads of personality tests which match you up to your best local and worldwide matches, although it's probably aimed at a younger audience.
I'm a lardybum so met my dp (and a few men before him) on a bbw dating site (big beautiful women...second B is debatable! lol) called [http://www.datingbbw.co.uk datingbbw.co.uk]]
Makes dating SOOOO much easier when you're overweight as I find it hard to pluck up the courage to speak to men I meet in everyday life.
Just keep safe, listen out for lies and complicated reasons why you can't visit them at home whenever you want to etc (sometimes married men use dating sites for flings) exchange pics immediately so you don't waste time on people you have no physical attraction to, and if you can, try to look as locally as possible. It's all very well falling for the man of your dreams online but they'r eincariably in New Zealand or Zimbabwe or something, and it's a LOT of upheaval!
Finally, save yourself some money by using skype or other voicechat technology (you just both need a microphone headset) and freeonline texts instead of your phone as you may do a lot of chatting before you meet up!
Webcams are also a good idea because you can learn a lot from seeing someone in real time rather than a static photograph (One guy I met up with had a constant and rather ugly sniff where he wrinkled his nose up and exposed his teeth- if I'd have seen that on webcam I would have been less keen to travel hundreds of miles to meet him iyswim)