You won't be able to avoid dust and lint, but they shouldn't be troublesome either. Try adding a little skimmer. It will keep the water surface clean.
Starting quickly to get some good filtration will prevent some yukkiness later. What is used for a filter now? If it is a submerged filter its applicability is very limited and will let you down.
I think this pond is about two soccer balls deep, maybe 150g. Will these 9 or 10 fish be staying there long?
the first red flag that always goes up with an indoor facility is natural lighting.....you'll need to deal with that or be content to watch beautiful beni go down hill