flute help needed please :-) Watch
You should practice by holding the flute in its proper position and placing it carefully in the groove between your chin and your bottom lip. Then practice carefully changing the angle at which you are blowing. First try blowing straight forward, and if that doesn't work you can try slightly raising/lowering the angle at which you blow to find the best position.
Once you can make a decent sound, its just a matter of practice.
You will probably find as you get more advanced that a slightly different blowing technique is needed for lower notes than higher notes, though its very hard to explain - you will feel it.
My flute teacher began with just using the head joint of the flute and standing me in front of a mirror, which helped a lot.
I was told that the lower lip should cover approximately 1/3 of the blow hole and make sure that the opening of the lips is in the centre of the blow hole (check this by seeing if there is a “triangle of condensation” centred on the opposite side of the blow hole)
Then once that is mastered, roll the head joint in or out to create the best tone.
Hope that helps - I don't describe it very well lol