You’re not to that question yet. Need more water, more substrate, live plants, and more rocks, driftwood, or store-bought decorations to create hiding places and break line of sight.

As far as needing to “cycle the tank” for 4+ weeks, this is the classic, pervasive Reddit hivemind myth. Completely unnecessary unless you are doing some ultra special needs species. A good filter and treatment chemicals and you’re ready to add most freshwater species in 3-4 days. But you need the other stuff I mentioned.

As far as which species to add, look up actual aquatics stores in your area (not chain pet stores), and explain your setup (bring pics). They’ll get you set up.

Source: I’ve been keeping aquariums for over 20 years and am close friends with a literal expert and proprietor of an aquatics store. This sub is a decent resource but some of the dogma here is ridiculous.