You most likely have a number of credit inquiries on your account now. The bad news is that it hurts your credit score. The good news is that they go away over the course of a few years to five years. I'd do a lot of research before getting another card. Get a basic one. I use mine for modest purchases like groceries. Credit cards also benefit from purchase protection, and serious tradeoffs like Rewards, which come from transaction fees (which in turn tend to raise prices on all goods that accept credit cards. There's no such thing as a free lunch).
You shouldn't be maxing your credit anyways, so 5k should be fine. Pay it off every month, the interest rate is insanely high if you fall behind. It's better to get a loan from a bank for massive purchases.
Ps- I wouldn't get a card that has annual charges, unless you are doing like, a shitload of foreign transactions whose transaction fees exceed the cost of the annual CC fee. Usually this doesn't pencil out unless you are Canadian and there's an American Costco a 25 minute drive from your place near the border.
Spain has such great pastries. I miss that place a lot. Wonderful people, great food, and a gorgeous country.