Flute newbie here. I'm learning to read notes and play them on the flute (Western concert flute, closed buttons). I find many sources for fingerings of the notes in different octaves. Sometimes they are contradicting and sometimes the fingerings are the same for different octaves. I also know that I can change the octave by changing the air speed. I'm confused about that.
If I see a low C and a high C on the note sheet, how do I actually play them? Do I change the fingering? Or do I change the air speed?
Some youtube videos show fingerings for higher octaves, and when I try them they sound differently, because I have a different air speed.
Some other youtube videos mention that the step between C and D is very hard, because you have to move almost all fingers. But that's not true, right? I can also change the air speed and have only a minor change in the fingering?!