Good morning every one

I got a pre-approved cc in the mail yesterday. DH says I should get it and use it wisely to improve my credit score. I’ve said no I don’t want a cc. Is he right. Won’t my credit score improve as I get my cc cards paid off? Do I need another cc to prove I can handle credit? I want to pay every thing with cash. He says its impossible to live like that, you need credit for big ticket items