Bank offered me credit card with no hard credit check because I applied for a car loan with them already. No annual fee. It can only help if I go for it right?

With no hard credit check and no annual fee it looks like there's no reason I should turn this down. 2% cash back on gas/groceries and 1% on everything else. I'm responsible with my 2 credit cards that I have now. This seems like an easy way to increase my credit limit and increase my total accounts.

Only thing that I'm on the fence about is that there was no mention of a sign on bonus and I'm not sure how bringing my credit age down will change my score. It's only at 6 years now.

You think I should go for it?