What's a good 2nd card after CFU?

Hi all, looking to get a good 2nd card after CFU because my spending limit is rather low and instead of paying off down to low utilization I figured building more credit in the meantime would be great. Landed a great job out of college and am looking to get as educated as I can in the world of personal finance. Am blessed to be living at home as well.

Also, would it make sense to get a new card now or should I wait a few months?

Thanks :)

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• Current card: Chase Freedom Unlimited, 500 dollar limit, opened June 2024
  • currently making use of 1 year promo for 5% gas and grocery cashback
• FICO Score: 748
• Oldest account age: Authorized spender under parents card for few years now (not sure if that counts)? Otherwise the age of this current card is 6 months
• Chase 5/24 status: Only the card above
• Income: 135k + bonus
• Average monthly spend and categories:
  • dining ~$200
  • groceries: ~$200
  • gas: $150 peak spending ($100 on commute alone)
  • other discretionary spending: $50-100
• travel: ~$1k (yearly basis)
• Open to Business Cards: Nah
• What's the purpose of your next card? Not sure here. I want to move out in 6 mo. to a year with my older brother.
• Do you have any cards you've been looking at? Chase Freedom Flex...not sure what other options are
• Are you OK with category spending or do you want a general spending card? Category spending is okay, I do see my spending expanding as I move out later on