No no a stick won't work, the invisible dragon is very small and agile and would easily dodge your stick. It only makes itself known when it wants to.
I feel the same about eyewitness accounts of miracles. Eyewitness testimony is not evidence. It could be a good place to start to investigate miraculous claims but that's all.
I'm not dismissing claims because it doesn't align with my experiences, but because there is no reliable evidence. In fact depending on the type of diety you propose I think many claims can be shown to be false because they a contradictory with reality.
I'd be interested to hear the evidence you have for sure. I'm open to changing my views. I'm not scholar but my understanding is that the best we have is a collection of anonymously written books which isn't enough for me to accept such a huge claim.
I don't know about the origin of the universe but I don't think anyone claims things came from nothing, we simply don't know what was before the big bang. Not knowing the answer to me isn't a good enough reason to assume a divine entity is responsible.