Millipedes soon, any advice too?

Hello, I will be getting some millipedes around spring time and I'm from Texas if that'll help with anything. I've been doing as much research as possible on ivory millipedes and I'm getting them from the defiant forest. I have a five gallon tank, some sticks, pebbles, leafs, and rocks, my desk isn'tthat clean right now but I'll clean it soon. I'll also be getting some more supplies from chewy and Amazon but I'm not so sure if anything I'm getting from there will harm them or anything. Here's everything. Please tell me if I need or should change anything.