Playing the flute is too hard!!
Question: I cannot play most of the notes, such as E, D, F, etc.
I cannot play quickly either. I have a band concert coming up and I need to play the flute well by then!
Answer: I can hear that you're frustrated! Playing a musical instrument well takes a lot of practice over time.
Don't give up, though! Decide that you're going to practice every day. Even a small amount of time, such as 15 minutes, will show great improvement in the next six months.
How about practicing 30 minutes or one hour a day? You'll be amazed at what you can do.
Good luck!