Started credit last year, now moving to a new card. Kind of lost. What do I do next?

I (25F) started my credit journey in August of 2025 (context at bottom of post) by opening a Capital One Platinum credit card. I always pay off my entire statement/balance every month and I try to spend around or under 30% of my limit to practice for when I get a card where that’s ideal.

Anyway, the capital one card was just to establish and build credit, and now I’m ready to move to a credit card with better perks.

I applied for the Southwest Rapid Rewards Plus Credit Card and was approved. I love to travel and I almost always fly Southwest, so I like that I can use points for flights, which will be especially nice when I want to visit home after moving to Chicago. I just received the card in the mail a few weeks ago.

Now I have two credit cards and I’m unsure what the best practice(s) is/are here. I have about $100 left on my capital one card that I will be able to pay off next week. What should I do next?

In my head that contains MINIMAL financial knowledge, I would do the following after I finis paying off my capital one balance:

1. Do not use capital one card anymore, but keep it in case of an emergency (?) until they probably boot me for inactivity (??)

2. Only use the Southwest card to gain points

3. Ummmm…?

Is this a good or bad idea? How would this affect my credit score, if at all? Is there a better way to go about this?

I am getting better about budgeting and frugality, but I know very little about credit card “hygiene” for lack of a better word. I am less financially-disciplined than the average bear and can be an impulsive spender at times, but I think my anxiety about misusing credit is my saving grace. The idea of having multiple credit cards kind of freaks me out. Do yall have any tips or advice for me while I start my credit journey and manage multiple lines of credit? I would really appreciate any thoughts!!

Also, please bear with me because I am working on my financial literacy, so I may not be using the right terms or doing best-practices or understand a lot of financial jargon. Thank you in advance for any and all help!

Context: I am a grad student and I live at home with my parents (64M, 62F) aka the lights of my world 🙂 they are very generous and have always financially supported me (housing, education, insurance, phone plan, car payment, etc.), so I have no debt/loans or what I would consider to be “big” bills. Right now, I make money via my graduate assistantship, catering, house/dog/baby sitting for this family I’ve worked for since I was 16, and other infrequent jobs. Income is sporadic and semi-inconsistent, but I’m usually pulling in more than ~$800/month.