Problems with fly rythm

[waterlemon]

I started swimming again after 5 years, but I have some problems with the timing/rythm of my fly. It seems to me I have my arms stretched before me just that fraction of a second too long. I don't know what I'm doing wrong at all, I learned fly as a kid and never really tought about it.

I tried to work on it but it just doesn't work out, it's like when my arms go back into the water again, I have to wait for my body to 'bend' in the correct position for the next stroke. Maybe I sink too deep, or my kick's are too slow,...

also I feel I have to do extra movement under the water to gain extra time for my (lower?)body position to change/bend again

Any sugestions/exercises?