For jetstream info click on resources (site menu to the left) and then weather and you'll see links to several jetstream maps. The slower the wind speed the better. Keep an eye on weather forecasts for clear nights (or stick your head out the window
) and away you go.
Nebulae yep. A good starter is Orion as it's bright and easy to find but you'll have to have a reasonable view to the western horizon as it's getting low now so if you have a view to the west have a go at that one.
Cheers,
Greg