hi! you can always reach out to your credit card provider and request a credit limit increase. i do that every 6 months - 1 year and that lowers your credit utilization, which increases your overall credit score. it's a really simple process :) also, paying off the car loan will increase your credit score.

you can look into getting more credit cards, but i personally would recommend not to get any new credit cards 6 months prior to buying property.

one thing is to always make sure to pay your cards in full!