Like the other replies have said:
Firstly, we need to see examples of your work so far.
ONE of the best places for freelancing is digital point. If you register there, then make sure to remember to put my username in the referrer box (xxll_martin_llxx).
I have actually just started forum posting for money earlier this week. So far I've got JUST over $10 with offers for more money if I wish to continue on two of those forums.
For your web and graphics work you should expect to start off cheaply, until people see what you're capable of and you can earn more. Always make sure to keep people updated on work you've completed and make sure to get people to give good feedback on your service.
Good luck.