Can second all these suggestions. Also, from my experience all the Haskell events I've been to have been incredibly welcoming and positive, whilst I'm aware there are a tiny subset of abusive people out there, I've never met them nor met anyone who would tolerate them.
Shoutout if you're in the SF area, BayHac (https://wiki.haskell.org/BayHac2018), a yearly unconference/hackathon is incredibly fun, and also there are (roughly) bi-monthly Haskell meetups (https://www.meetup.com/Bay-Area-Haskell-Users-Group/) in SF which are great fun (disclaimer: I co-organise the meetups - find me @Nick_enGB).