I've heard that sports book is pretty good. Are there any sites out there that are really good and easy for beginners? I think I might want to get a credit card only for online gaming, is this adviseable?

I'm not sure what you mean by easy for beginners, most sports book sites have the same spreads.

I would suggest Sports betting and online football betting at Sportsbook.com or Bodoglife.com - Bodog Online Poker, Online Casino and Sportsbook

sportsbook has the best promotions I think, they will make a 100% bonus first time deposit, and you can deposit as low as $50, Bodog on the other hand has a 10% bonus deposit, however it is unlimted, while sportbook has a $600 limit.

But yeah you will need a credit or debit card, or you can wire transfer from your bank account.

I am a long time customer of BoDog. They have been around forever. Great customer service. You will not go wrong by chosing BoDog.

All sites are the same as for advanced or beginners go as the lines are the same give or take a few.
But as for credit card, I would find a site where you can deposit by your bank account as most overspend and its not fun anymore, just an obsession.
Try and play with money you can afford to lose, that will keep it fun.

Does using these types of sites fall under the new law that is in the states? I would think so and if that is the case then I wouldn't be able to use them. I so hate this new law.

I think most of the sites are offshore as to avoid the laws of the states. I used to bet on SportsInteraction, which is an offshore site, but they don't accept credit cards, you have to deposit by wire transfer.