My first terrarium

Hi all,
I build my first terrarium using this änkebar greenhouse from IKEA. I seal everything and im using a cork background.
What you guys think? And suggestion? I think there is too many plants. But I want to let like this to understand how the plants will handle the environment.

I have some isopods and springtails in this

One point that I dont understand why is the humidity is 99% all time the temp is 24°C. But the soil looks a bit dry.