I’m 21 and have 3 credit cards so far. First card I didn’t even know was a credit card until recently. I got the alphaeon credit card to pay for an elective surgery, 6k limit. Then I got the capital one quicksilver with a 5.5k limit. Last one is the Chase freedom unlimited with a 7.8k limit. I’m mainly looking to get the most cash back/points for the categories I don’t have covered yet. My biggest expense is gas and I only go to Costco for that, but I’m not sure which card to get for that. I got pre approved for the savor one and was interested in that. I’m just looking for a little guidance before I take a hard pull. My credit score is vantage 750, thanks!.