Idk, I cannot equip anything on her :(

Hi everyone!

​I'm pretty new to the game (currently Level 45) and I feel like a total noob when it comes to hero building. My heroes are really struggling with quests right now, and I'm not sure what I'm doing wrong.

​I've attached screenshots of all my current heroes and my inventory (seeds, drinks, special items).

​Could someone please explain to a beginner:

​Hero Advice: Looking at my roster, who should I keep, who should I fire (retire), and what classes should I get instead?

​Items & Seeds: I have a lot of special items (Seeds, XP drinks, etc.) in my inventory, but I have no idea how or when to use them efficiently. What's the best way to spend these as a beginner?

​Any tips, explanations, or beginner-friendly guides would be greatly appreciated!

Thanks for helping out!