It's ABG (Atlanta Botanical Gardens soil mix)

Baking the wood is mainly to kill anything that might be living in the wood or on it. You don't need to dry it out. Infact wet wood helps you maintain humidity in your tank

As for the soil adding some Repti Bark to what you have will help it drain better. Also add in some Orchid bark

Tank looks good so far, A nice piece of wood that reaches up into the to of the tank will help your plants and frogs use more of the available space.

Once all the plants grow in you will be able to see better how things look and if something needs to be moved.