Credit Card History is 15% of your FICO Score.
Your goal is to have 8 years of history to receive 40 points to your FICO Score.
If you get an offer to do a “transfer balance” do it, but don’t close the account you transferred from. It will lower your score.
Make sure to use your credit cards at least once every 2-6 months so the creditor does not close the account.