I found the following book very helpful when I was dipping my toe into Astrophotography: Getting Started: Long Exposure Astrophotography by Allan Hall. It is available on Amazon.
It covers the basics: mount, camera, guiding etc. The equipment section is probably a little out of date, but the fundamentals discussed in each section are still valid. It provides a good overview of the whole process.
I started out with a non-Astro-Physics mount but later moved to an AP1100. Once I moved the the AP1100 I found that I was no longer fiddling with the mount because it just blends into the background. Once your ready to actually start trying to image, I would recommend that you start with a 90-127mm refractor. If you jump right into a long focal length scope you could spend a lot of time chasing your tail while you're trying to learn the basics. Just my 2 cents.
Gold Creek Observatory