Technically, this isn’t a question. But I think I get what you’re asking.
I would always rather watch a scene that was truly terrible because someone took a big chance and struck out than a scene that is middling because everyone on stage was unwilling to take a chance. At least the former is interesting.
I can say a lot of the normal improv voodoo stuff like trust your instincts, follow the fun etc, etc, but I don’t find those phrases to be particularly actionable as notes. So my advice would just be to make A move. My guess would be that you freeze up because you’re desperately trying to figure out what “THE move” to make is… the one move that’s the “right move.” And the 1st step towards getting rid of that fear is just making A move, any move. There is no such thing as the “right move.” Just moves that work and moves that don’t.
I hate the phrase “There are no mistakes in improv” because we all know that’s not true. If it was, there wouldn’t be bad improv. But what you CAN take from that idea is that you shouldn’t be afraid of mistakes… especially if you’re at a point where you’re still learning and figuring out what kind of improviser you’ll be. If you make decisions in your scene, you’ll be fine. DECIDE what you think the game is, DECIDE how you’re going to play it and DECIDE to make a move to achieve that. That’s really all there is to it. The worst case scenario is that you’re on a different page than the rest of your group, but if you’re really listening, the chances of that are slim. In your next show, have the goal of making decisions at every possible opportunity and then acting on them, and see if that gets you off that backline and into more scenes, good or bad.
Or, maybe you’re just super lazy!
Another great post: 1) Make A move. 2) Don’t be afraid of mistakes.
Hopefully my students have heard me say these things a lot. I know I say the first one a lot and I suspect I need to say the second one more.