Flossie, I promise you lol, they really aren't that sensitive.
no need to worry, just take care and enjoy your new fish. Do everything like you normally would and they'll be fine. They'll adjust way faster if there's a set routine anyway. Just get the salt out of all the tanks (it's not needed, and can be bad in the long run) remove it slowly. Really, just don't add more and do a weekly 50% PWC. I promise you, your fish will be fine.
fish tanks are supposed to be a way to relax... Let them do their job! Lol.