If I were to loan money with exorbitant interest rates to strangers, I'd be arrested for loansharking. If I owned a bank, and handed you a nice new shiny plastic card, it's called business.
If I give out enough new shiny plastic cards, I'd be given an award, and enjoy status as a pillar of my community.
It's great that you want to establish your credit, but remember that debt is a slippery slope. We consumers can't win in the long run by playing the finance game. The banks want you to pull the plow, while they reap the rewards of your hard labor.
If you get a card, my advice is to use it VERY sparingly; just once in a great while to build credit, but no more. You'll feel better by paying cash for things that YOU own. Some cards provide an extra layer of protection if you purchase items like a MBP and you have problems with it, but save up the money FIRST, then pay off the card entirely when you get the bill.
Good luck, and welcome to the adult world, which can really be a pain if you play the game according to the bank's rules.