PLEASE, DO NOT PUT ANY FISH IN YET!
Google ‘cycling a fish tank’, which involves building up the good bacteria that turn harmful ammonia (from the fish waste) into harmful nitrite into not harmful nitrite. You will need an ‘API test kit’ to check the levels of these. Cycling a new tank WILL take 4 maybe even 6 weeks. Don’t add any fish until then.
The water also needs de-chlorinating, sometimes referred to a treating the water. ‘Seachem Prime’ is much more cost effective than any other product.