Hey Dan,
great to hear you are out having fun. The line you are looking for is a "topping lift". Your
boat, at 35', is right at the edge of where you need one for a whisker pole. Most boats under about 30' don't use a topping
lift on a whisker pole, most boats over about 35' do.
Unlike a
spinnaker, the
jib is usually strong enough and shaped correctly to hold up the end of the pole, you use the
lift if the pole is pulling down too much in really light air, or if the pole is heavy enough that it puts too much weight/strain on the sail.
If you want to rig a lift, remember that you'll want to be able to use it on both sides. Don't know how your flag
halyard is configured, but assuming it is on a spreader on one side that might make it difficult to use on the other side. You should be able to find a place on the front of the mast where you can hang a block, and then run the topping lift through that. It will be external, if you don't like that then it would take a much more detailed look at your mast to figure out.