Using Google Forms is relatively easy. Training someone to use the basics of making Forms is a synch. A simple step-by-step training session can give participants all the information and practice they need. Or, you could forward participants a pre-training video and set it as one of the training tasks, to be completed asynchronously... people can train themselves when given signposts to the right resources.

Watch a video like this and then, when you get into the face-to-face Forms training, everyone will be ready for a quick review of the 'how-to' before embarking on the more interesting question: So, we know how to use the basic features of Forms, what fun, engaging stuff can we do with them, and what else can we learn?