Ah! That's better!
21 knots shouldn't be a problem to tack.
What I usually do is get some speed, push the rudder, keep the jib back winded, and when we are almost into the wind, I change side, and while I move underneath the main, I release the main push it out 2 or 3 feet, almost to the end of the track. The main remains into the wind while the boat is turning on its center, helped by the backwinded jib.
If I keep the main sheeted through the tack, it just won't work, and the boat will stop dead, as you noticed. By pushing the main, I really tack on a dime, even when facing waves, although wave timing becomes part of the equation.
Crew placement is less important, except that you want of course the crew to switch side at some point
I also tried tacking without the jib, and it worked, although that was not as easy.
In my experience, the Getaway will handle 21 knots without problem.
Are you sure however about 32 knots gusts ? that's a big jump from 21 to 32 !