First Broadway show ever and I picked Hadestown — first-timer tips?

Visiting NYC and finally seeing my very first Broadway show! Up till now I've only caught touring productions back home, so being in an actual Broadway house feels like a huge deal. 

I went back and forth for weeks, but landed on Hadestown — the score's been on repeat for me for years, and I figured nothing beats hearing it live in the room it was built for. 

We've got a 7pm show at the Walter Kerr. A few newbie questions: 

How early should we realistically get there? 

Anything to know about the theater — seats, sightlines, coat check? 

First-timer nerves are very real lol, any advice appreciated 🙏