At 19, you have a current debt of £2,100 and your income is ...?
It is good that you are concerned about debt and managing it, but don't be too scared yet. When you have a £250,000 mortgage, children, five credit cards maxed out and just been told you're unemployed - THAT's when you get scared! (Just happened to one of my neighbours).
Firstly, get rid of the credit card debt - that's usually the most expensive. You should also try to make a budget and stick with it. I recommend Microsoft Money to most people. It is easy to use, gives you a good view of your current finances and allows you to plan for the future without having to go to professionals 'unarmed'.
Make a budget for owning and driving a car and then decide if you really need it. Many people make the mistake of thinking that they need one when really, they don't. If you live in a area of good public transport, save your money and use the facilites that exist.
Hope this helps
SHARK!