There's also FANTASTIC planet texutres available. It's vice versa for me. KSP helped me in Orbiter. Pre-KSP I could never fly the space shuttle into orbit, or go to mars.
It's hard initally, but when you get the hang of orbital stuff, it's really easy. I've gone there literally 100s of times. Even did 3 apollo styles, and one apollo style on Duna!
I couldn't dock for hell pre-0.18. When the magical "closest approach" and 'target relative speed" I docked on my very first try ...it isns't hard. Launch at the right time. Know how to burn. Use balenced RCS, and use chase cam! And "set as target"
God... this+ the music is very powerful... I now feal sad for every killed kerbal... .... I need to send 1000 kerbals to Gilly. That's about how many I've killed in my career