I would prolly ship you over to cloudynights to start with. Good people that won't steer you wrong. Stargazerslounge is another one. It's been so long since I did this stuff, I can't remember whether the settings I remember are the "post-advice" ones or are the ones I made up that made me want to chuck my tripod across the darkened pond.
Ps- Don't be scared when you start seeing a bunch of red pixels. It happens.