You're light by about 100lbs. That's the main problem. Get a water bag (they can fit in a tramp bag clipped to the tramp lacings and stored on the bottom of the tramp for zero clutter), a righting pole, or a crew.
I would not recommend sheeting in the jib (or any sail) to right the boat as once you pull the boat up, the jib is going to power up, turn the boat downwind, and make it want to take off. Also, sheeting in the jib to the upper hull would force the mast down into the water if the bows are turned into the wind.
Sometimes loosening the downhaul (in addition to the traveler and sheets) will make it easier for the sail to spill water. You can also take your righting line and wrap it around your harness hook to support yourself. This will take most of hte strain off your arms. But the main problem is your lack of weight. If it's windy enough, you will probably be able to right the boat, but in light wind it isn't going to work.
To turn the boat you can also often just shift your weight close enough to the bow to drop it in the water and this will help rotate the boat into the wind.. You want to point the boat on a 'close hauled' course... With the bows about a 45 degree angle to the wind..