Hello
I too am new to amphibs, and as a newbe my self I am no athority, However, from most of my resaerch your tank looks to me like you have rocks or small pebbles in it. Alot of what I have read this past week says that you should never put them in your tank as they could be swollowed.
Again, I am new and am in no way an athority. Otherwise your set up dont look to bad. I used a substrate like bed a beast.I have branches, a water dish plants, and a hide.

Perhapps someone with more knowledge could help to enlighten us both.
Paul...