I don't really have any reads at this time, I know that isn't super helpful. Mafia is still a bit confusing to me, and I don't really know how you are all reading each other so easily. It might be that I am just not used to this crowd, but I don't really see anything that stands out.
My only advice for scum hunting would be just go with your gut. If something feels weird for someone to say, point it out and say why it felt weird. We're basically roleplaying cops here. On day phase 1 without a lot to go off of, it's okay to make a bigger deal out of things then seems rational. You will learn people's metas and can associate differently from them. For example: Pie loves policy lynching millers. It's a meta that I don't think everyone agrees with, but him saying it is a null tell since it's something he would do regardless of affiliation.
Or Joebob (who isn't in this claim) claiming early, and easily, or not contributing much isn't a scum tell as its a common behavior with him. Unfortunately he still gets mislynched constantly for it, as you saw in the last game. Joebob is probably one of the most mislynched players in mafia period.
Or Greyparrot, insta claiming, isn't a scum tell and something he would do regardless of affiliation. You just have to learn the group we play with and see their little niche things they do over time. Until then just nit pick everything and go with your gut and what feels right.
What is a miller and why is earth being pressured for being one?
He isn't being pressured, Pie just wants to lynch him if there are no alternatives. I am ignoring the policy lynch millers idea and I think for the most part everyone else is too. It's a pie thing. Anyways millers appear guilty to cop results, and are designed as a negative utility role for town.