are you talking about at the beginning of the story mode?
or are you talking about free roam?
grab two carrots from behind blacks house got near the rabbits crouch press 1 or 2 which ever works for you then press q you should then throw the carrot where the rabbit will see it don't get to close or they hide when one is eating the carrot go in front of them crouch and hold q until the Dimond above their head turns purple immediately stop and start going towards the taming spot keep in mind they can lose interest if that happens just go up to them and crouch and hold q again don't let them to close while doing it when you reach the spot and the lantern lights up then crouch then hold q and let them do their thing make sure you face them
keep in mind you MUST see the recipe first to even tame any of them. you can also relook at the recipe to learn how to tame them again once read through at least once on you journal just press tab and it should be self explanatory.