New to Apple Watch and VoiceOver in general

Hello,
I was recently given an Apple Watch for my birthday. Since I am slowly losing my vision, I have come to depend on VoiceOver. Can someone help me to understand the gestures and what role the physical buttons play when using VoiceOver? I seem to be struggling with two-finger gestures. Any help would be greatly appreciated.
Kind regards,
Steve Jobs
P.S. Yes, Apple created VoiceOver. No, that does not make me an automatic expert.