The word initially can be used to describe an action that happened first. You might initially want fish for dinner, but then end up getting the pasta special that looks so good.
The adverb initially can describe something that happened at the beginning. Initially you might have thought the apartment was too small, but then you decided to take it because of the rooftop garden. You initially wanted to go to college far from home, but decided to stay closer to be near your family. The bride-to-be initially wanted an outdoor wedding, but decided against it because of the area's unpredictable weather.