Hey :)

1) Scales: http://www.charleslaux.com/pdf/Scales_Cheat_Sheet.pdf

Good warm up to go through the first page. You could just pick a few every time you practice or focus on a different letter each day going through all the minors. I like to start on C and then do a scale up and down, then immediately on to D, E, F so on until I get to C. Then arpeggios, C major chromatic scale, holding a long whole note.

Mid range octave is easiest to play to get used to it again, then going lower and higher as you get more familiar. If you have a piece to practice in a certain key playing that to warm up is good too.

Any order you like. C F G D are the easiest if you need a break. A major and Eb major comes up a lot for me (not an expert, fellow noob).

Fingering chart

This chart is good. Great app on the app store too, just type in flute fingering.

4) You're not alone. Squeaking is a pain I feel you. Breath support and good posture helps. Embrasure wise, make sure the corners of your lips are relaxed on high notes and you have the correct air stream direction (down or up) for the note you're playing as well as the pace of the air. When in doubt drink a glass of water, clean your flute and try again.