The problem would be similar to a larger sailor uphauling a decent sized fully cambered race sail with its large luff sleave full of water

. There is plenty of great advice already on this thread. So here is my variation.
With easy uphaul connected keep an upright and straight body and lean back until the sail eventually floats near the surface downwind of where you are standing. Patience is your friend. Start to bring it up with the sail clew now pointing downwind of the mast (at this point the clew might even be submerged) . Now comes the skilled bit when all the hard work can go astray. As it comes up push the mast across your body but mainly forward, sheet in to get enough to lean back against, bear off with foot steering and sail away.