While its a common practice by many new startups to put in damsels, I felt its time we shift the mindset as today's technology and knowledge of marine have advanced significantly to do things differently. In the past, marine aquaristics are fish predominant. Today, that have changed.
The 'put-a-damsel-in-and-see-how' can now take a back seat.
I find building up with hardy inverts first approach have its advantage as they, being photosynthetic and mostly filter feeders do not throw out a lot of waste, unlike fish.
Simple inverts like star polyps, zoanthids, soft leather and mushrooms are good starters. As they are also mostly attached to LR, its presence also help the breakin period to stabilise, by then, making way for higher corals and fish.
Just my 2cents
Cheers and happy reefing