Credit card suggestions

I am currently looking for ways to bump up my credit. My credit score is currently a 691. I have a kohls credit card and have monthly car payments which is the only thing currently building my credit. I understand how quickly a credit card can cause problems but I am very responsible when it comes to paying my bills and I'm not one to spend beyond my means.

I was thinking about getting maybe a Walmart credit card just for my grocery shopping because that's something I have to buy anyways and will be able to pay off every month. But then I started thinking about other credit cards with low interest rates, no annual fees and perks would be a plus and was wondering if anyone had any suggestions.

I'm not looking for people to suggest not getting a credit card or try to warn me about credit cards 🙅‍♀️ thank you in advance!