You should add time to your plan so your tank can stabilize and allow supporting bacterial populations to adjust. I personally recommend 30 days or more between increases of 10-25% bio load.
I would add some snails if you haven't yet. Maybe 5 of each of major type of snail (sand, rock, glass) you want - not too many (especially the algae eaters if you don't have much algae yet).
Typically I like to see less aggressive fish added first to let the more peaceful fish establish territory. Really think the hobby needs to acknowledge that clowns probably shouldn't be the first fish added to a community tank. But you have time, most reports of aggression are after they start mating/pairing.