I can play regular notes, but i don't know how to play all the sharps and flats. is there a tutorial for them? if not, what is the fingering?

Hi Talysha, The fingering is the same for the higher notes you just need to blow the whistle a little harder and sharper. For the lower noted you might not be able to play them on your whistle, for these you may need a whistle in a lower key, they do generally have the same fingering however.