Put down the flute for a minute. Hold your forearm up in front of your face, vertically - fingers up, elbow near your ribs. Using just your lips, move a beam up air up and down your forearm, from elbow crook to fingertips. (This is like changing the angle of window shades, right?) Do not blow harder - this is AIM, not force. Make sure that your airstream is small, like the interior of a drinking straw. Pick up the flute, and start with a note that uses closed fingers in both hands - like F (notes that use only closed fingers in the LH are harder! Only *Band* instruction books start there - they want you to match the BAND, but this is harder on the flute!) Try directing the air so that you get the lower and upper notes in your control - aim more down for the lower F, and more up for the higher F. When that is working try Eb, and keep the C key open for the higher one (easier than E - long explanation why, just trust me), then try G. still good? - try A. That's enough for now. Go back later, and see if these still work.
As you expand lower and higher, things get slightly harder - do not get discouraged. Low D is not easy to get, but the 2nd octave one is - open that C key! If A is working well, then try Bb. C (third space) up to the higher C ( 2 leger lines) might have to wait a bit.
Here is a good fingering chart: www.wfg.woodwind.org YES - whether you open that Eb key or not, or the C key or not, makes a BIG difference - be aware of what you are doing!
However,the most critical part of the flute is the EMBOUCHURE - you really need a good flute teacher to get you going with that.
Good luck - and get a good flute teacher ASAP.