Decided to give terrarium making another shot, thoughts?

A while back I made a terrarium but it most certainly wasn’t a very good one, but after some planning and finding this cool acrylic terrarium I decided to give it another shot. Any thoughts on how to make it better or what to put in it? I currently have springtails, isopods, a couple of darkling beetle larvae/mealworms, and a small snail. I eventually would like to add some sort of larger insect like a praying mantis or maybe a centipede or something similar.