Like ShawnB said - do not throw with max power, slow and smooth is far !
Do not throw the disc up in the air, that stalls it, throw it flat/down, the down/nose-down will make more sense once you get better at throwing it flat.
Pretend you are pulling it on a straight path along the kitchen counter top.
Disc must be in close to your chest as you pull thru - MUST.
Disc must rotate, a non-rotating disc does not go far, so throw flat, with good timing where your weight is not behind you, and rotate the disc at release - with good timing, it will pull out of your hand and trigger more rotation.
- KEEP A CHECKLIST - keep a piece of paper and a pen with you, write notes, and then review the notes when on the course practicing - write notes about pulling smooth on a flat plane, no OAT (off axis torque, dont crank the disc over), weight forward, hips turning, following thru, etc.
One thing I took from the Feldy video posted above - on drives, press down with the pad of the thumb versus just the thumb and fingertips, it helps !
A new Star Eagle is an Eagle-X and is pretty overstable, I think the Eagle comes after getting good with a Teebird, experienced players can smooth a Teebird out 400+ feet.
Always have fun !