Did you get any of that stuff outdoors? If yes were they sterilized before adding? I would recommend it you dont want to introduce anything to your axie if you can avoid it.
There is a thread somewhere on this site on it! But maybe somebody else can provide it because i forget where i found it but i know rocks and stuff you just boil for 5minutes and driftwood you bake... I have driftwood i want to add to my tank someday so i will need to find the thread again as. Well someday.
Other then that it looks a lot better then my first setup that i had.. Mine had two hides and that was it lmao! Since i had two juveniles in a 10gallon.. I think a 10gallob could handle one adult but after trying to keep the water stable and cycled with two babies in a 10gallon i would recommend going bigger--- and i didnt mean immediately in the last thread, but you will probably agree once you get your axie and it starts to grow and you want to rip your hair out!
Its a lot easier to keep a bigger tank stable and clean then a small tank

i currently have two 8" and three 6" axolotls in a 25gallon tank >.< its not crowde because ive added levels and such but for me i need to do a water change every second day.. Which to me isnt a hassle since before i had two in the tank and three in tubs doing 100% water xhanges daily.
For me this is also just a temporary tank, i dont want to upgrade to what i can afford now and still need to go bigger later on, so im waiting till i can afford a permanent tank for them..
Im sorry if it sounded like you shouldnt get an axolotl in your last thread! Thats the last thing i ment! I recommend axolotls as pets to everyone! I just like making sure they know at least the basics, im learning everyday still on how to take care of them properly. They are just so unique but it makes raising them just that much more rewarding! They are wonderful.