Im not sure if I'l film myself,but I will add narration with audio for sure. The room is long and I the tank will be in the same direction as the room, the opposite side of the aquarium is all window but I can close the shades and make it 100% dark except for the aquarium itself. Apart from the aquarium Il have a desk and a bed, and in the future a terrarium with monitors in it (monitor as in the reptile not an actual monitor).
So if you don't film yourself, you may not need lights at the beginning. And you don't need to think about a teleprompter either. You could think about a black backgrund, or you can keep the wall as is - that depends on your preferences.
What kind of lights are you going to get and will the tank be open, or closed?
How are you going to present the equipment you've been talking about?
I don't know how big the tank is, but if it's possible to put in on wheels somehow, that might give you nice options later on. The desk might help you with the slider btw, in case you decide to get one.
Plus: consider some sort of timelapse. Therfore you'd need a place where the camera can be placed equally every single day, better 2-3 times a day. The difficult thing is: it will not have the same framing as soon as you touch the camera and I'm not sure if autoalign will work in post production when the content of the tank changes. But you could try it.
A very important thing is a storybook and a structure. Have your text and the structure of your videos ready way before you start the work on your tank.