lol, i don't think you have any idea what your getting yourself into with a damsel. they will claim the tank as cali girl said, and are often times not too keen on leavening it. the number one compatibility issue in saltwater aquariums in my experience is hands down damsel issues, and often times the resolution involved tearing apart the whole aquarium trying to catch them. most of the cases of people crashing their live rock were related to damsel removal.
you can use a trap and it seemed like many customers had fairly good results doing so, but its a pain and can be pricey. both hawkfish and gobies are pretty hardy. i would start off with a reasonable fishless cycle, a few palmfulls of food or so, then after that spike starts to settle add some nasariouss and overfeed, after that hermits and continue overfeeding, a while after that let it settle then you should be good for a hardy none damsel fish. monitor the tank for a while after the addition of a few hardy fish and if all seems well without any major fluctuations then your ready for your clownfish. be cautious in your selection though because clownfish take some serious abuse at wholesalers.
damsels are really really bad fish. if you actually want damsels for more then just cycling purposes that’s fine, but I recommend to add them last. as caligirl mentioned they claim the tank and become very territorial. I once had a customer who actually had a pair of clowns with a damsel once. he lost one of them and could never replace it because the damsel he had in the tank never allowed new fish.