Second Credit Card Options

I’m not great with credit cards but am financially literate.

– 1 card (capital one platinum, $500 limit, $50 monthly usage to build credit, account opened 6 months ago)

– credit is 702 according to Experian as of today 3/30.

– first month usage for new card ~$3k

-monthly usage after first month ~$350(gas)

I am moving in 2 months and plan to put about $3k of expenses on a card to delay some of my moving costs. Would like to get back some cash or airlines miles for doing it. Would apply for cards myself but none say credit limits on the application and legitimately need a limit around 3k. Card will be paid in first month just don’t have cash to cover all expenses when they come. I don’t know a ton tell me if it’s impossible if so or just call me an idiot if I am. Any bit of info helps.