Take your time and do each step by throughly researching the subject first.
When you do this you gain both the knowledge and confidence to deal with all the possible scenarios you may encounter.
Indeed. I can only speak from my own experience, however I’ve heard more success stories than failures and I feel like it’s worth while trying.
The reason why I specifically advised to add a female is because of the damsel, they’re quite aggressive and it’ll start attacking it regardless of the size of the new clown.
Though a bigger one would have a better chance protecting itself.
I’ve never seen them bother each other, I wouldn’t worry about it.
Fire shrimp usually hide all day and come out only when you feed.
Cleaner shrimp on the other hand are far more active and visible.
You could probably add 2 more small fish in there, however I’d wait a bit more till you introduce some corals for nutrient consumption as well as to better get familiar with your system under load.
As for fish - I’d recommend adding a Lawnmower Blenny as a herbivoirour, a sand sifting goby if you have sand or even a Mandrain or a Scooter once you have a good and stable copepod population growing in there (or you could also cloture them separately and feed).
No worries