Your tank looks awesome
What else is left to do on your list, if anything?
Since the pics above I have added all the plants I had on standby and realise they aren't enough to achieve "densely planted" status in the relevant areas. So I either need to get more or work on pruning/propagation.
But they are enough I guess to start the whole tank "living".
So the next steps are:
Establish a base point for water quality
Add creatures - prob guppies or shrimp - and ideally establish them breeding. May or may not be achievable.
Once nitorogen cycled, add axolotls
I estimate that will be about 10 weeks after first getting the tank. May yet be longer ...