Congrats and welcome to the forum. You headed in the right direction now.. I'd stop at the 3 cards for now and let them grow. Stay away from store cards. They all HP now anyway. If you dont have an installment loan. Check out self lender. Then you'll be set for a while. If you didnt burn Disco. Try their pre-qual in 6 months.
Now the Cap1 card. After 3 statements clear. Go online and ask for a CLI. Its a SP. Month 4 find the upgrade link on the site and get the QS upgrade for cash back. Stay away from the QS1. Then credit steps will kick in. Use you 3 cards and use the AZEO or all zero except one reports a balance of say 10 bucks. Your on your way now.
Congratulations on your approval and good luck with your rebuild!