> Fico Experian 746

Ignore the Credit Karma score, it's worthless.

Your FICO is fine, anything above 730 or so gets you the best rates.

As others said, the oldest account is the issue here, so don't open any new cards, get any loans, and work on getting employment and you should be good. If you do anything, consider getting a credit limit increase on one or more of your cards if your credit utilization is above 10% (only accept if it's a soft pull, as in it won't impact your credit).

You're fine, stop worrying about your credit and focus on the job.