Future world record in 100m freestyle

(Hey, so I want to hear your thoughts.) So hi I'm male 15 years old and I am a Latvian swimmer and right now I have an Olympic dream setting a world record in 100m free but since my old coach did not care about us even tho she was training me since the beginning but anyways me and some dudes decided to change the coach to a better one that actually cares and trains her athletes and she has given me hope bc of the old coach I did not care about swimming but now I've been doubting my results bc I should already be swimming at 27 seconds but I only swim at 29. So your thoughts, can I make it? Won't I disappoint my current coach?