out the harnes.
bear off on to a broad reach.
pump equally with front and back,slight bend of ze knees, USE the whole body to pump - not just the arms.
try and get your weight off the board and over the water helps.
use a bit of swell to make life easier.
keep going, keep going, keep going, keep going, keep going,...nearly there, keep going, keep going YES ur on the plane...3 seconds later wind drops, u stall . start again

once ur on plane maintain speed thru lulls with small backhand pumps.
maybe just put front foot in strap, untill u feel u r going fast enough to put the rear foot in