I just got a baby/juvenile bearded dragon and I have been researching a lot in order to take good care of him, but I'm not sure if I'm doing this right.

For context, I got him for free at the pet store (because the tip of his tail was missing) and he is currently in a 40 gallon enclosure which I will upgrade once he reaches a year old. He has 4 hides (2 under basking rock, 1 under wood bridge, and 1 where the basking rock and hammock touch) but he hasn't used them much.

I added a picture of his enclosure because I need some help. I recognize that it isn't good, which is why I'm here. I want to make sure he has the best life he can. I'm going to add some more sticks soon and eventually substrate once he is a bit older. I also plan to add a foam background for him to climb on.

He also keeps glass surfing on one side of the enclosure and idk why. I've handled him twice he is very anxious so I'm going to give him more time to adjust.

TLDR: Need advice on enclosure, glass surfing, and handling for baby beardie.