Hi there, Ruth is right, the more you apply for, the more it affects your 'rating'. The card company assesses your income and expenditure, and allows credit to a certain proportion of your 'disposable' income..that is what's left after all your bills are paid. They will also take into account whether you are paying your other credit bills on time, phone contract, bank loan etc and also the same for people who live at your address. The credit crunch has also made banks a bit fussier who they lend to, and how much. If you go for one that advertises in the paper,for example, chances are they may give you one, but the available credit may be low and the interest rate will be horrendous.(You just need to be aware of this) Hope this helps..(I worked in a bank in a previous life...!)
Also, the law says you need to be over 18 to get credit...not sure how old you are, sorry ....