Hey Ryan! It's awesome you're thinking about this now. There are a few steps you can take (I did these steps before graduating and buying my first househack):
- If someone you know has an excellent credit history, you can ask them to add you as an authorized user to their account. This will help you "inherit" their good credit and age of account. Note that if they have poor history or if a payment is missed, it would reflect on you as well.
- If you don't think you would be buying in the next few months, opening another line of credit may be a good option. Typically the hard inquiry from those will only last a few months, and entirely drop off your credit after 2 years.
- You could also look into sites like Experian Boost that would report things you may currently pay (phone bill, utilities, streaming services) and that could also help there.
With your situation, even though you may have perfect payment history it is difficult to start because you don't have a large mix of accounts (credit cards, auto loans, mortgages, etc.) and the average length of accounts is small. An important note with your current card (or any others you may get) the magic number for utilization rate seems to float around 9%. So for example, if you have a credit line of $1,000, research would suggest that the optimal balance on that account for improving credit would be $90 or less. Make sure that there is a balance on the account every month though, as having $0 does not help you improve your payment history or utilization. Keep the balances low, and then pay the previous month's statement balance in full to prevent paying extremely high interest rates.
No affiliation or anything, but as a student I started with the Discover IT Cashback card. This was a great first card and was not difficult to qualify for. My next card I got while a student was the Chase Freedom Unlimited and gives 1.5% cashback with no annual fee, and getting Chase cards early on helps you avoid their 5/24 rule.
This is a lot but if you have any questions, feel free to reach out!