No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
How do you garden?
Time and patience. Gardening, to a degree, is the very essence of being stagnant. That's the whole point.
Hunker down and sit tight for the long haul.
If there's one thing I would consider for you, it would be waiting until that Cap 1 unsecured hits the six month mark, then I'd consider closing that Cap 1 secured card and reapping for a second unsecured card. But DO NOT do it until the unsecured card hits your six month mark, or you will be denied on any new application. Plus you'll lose the secured credit limit reporting which can make UTIL an issue. It would, however, free up your deposit to potentially pay off that last collection on EX.
Doing this, however, goes against the notion of gardening. So if you're committed to the garden, sit tight and don't make those moves.
You've got to let that Discover IT age (is it secured?), as well as the Kohls card.
It's an exercise in patience. Use a card, pay it off, rinse, repeat. It takes time.