Several years ago I created a thread documenting my step by step process of building my indoor pond.
If you search for it the project was over 4 years ago. (I'm too lazy to look for it right ).
Sadly I never finished it because I was in a serious car accident and had to abandon everything.
Fish were sold for a fraction of their worth and eventually the pond and all accessories were sold at a loss....but a gain to some fellow members.
One day I might just start over again and finish what I had envisioned for the project.
Good luck with your endeavor....don't let time discourage you.