Main advice: just do it! You will quickly realize this is 99% of what wing foiling is actually about, getting enough speed in swells that you don't need the wing any more -- it's a personal jetski for towing into waves.

Agree with suggestion above, as a partway step you can hold the wing with just front strap, almost like it's a kite with some gentle downwind pull. I do that or still the two hands above head in some situations, light or gusty wind, waves not quite right, etc., as you can very quickly get back to powered riding with no fuss.
You may find in switching to front handle that you miss the grab sometimes and the wing drops away. This may eventually lead to you coming off foil -- or you may find that you start being able to rescue it, reel it in by the leash and keep going.
I don't know the Arm foils that well....buddy loves the 25 series though. Use whichever helps you stay gliding in the swells for longer.