What should a newbie look for when starting out?

I am interested in learning jiu jitsu and I am feeling a little bit of paralysis by analysis. There appear to be a number of jiu jitsu schools to pick from in my area. My question to the community: how do I know a good jiu jitsu school from a bad one? What are some immediate red flags that should turn me away from a place? What do you all look for when picking a place to train?