Hartford and New Britain in particular are diverse! I can't speak to the schools beyond having worked with some NB high school students for one year, but they were great kids and a really diverse group.

You can ask them for estimates (the utility company once you figure it out) based on what the last tenant used.

I have a ~750 sq ft apartment in New Britain and pay about $35-40 a month in electricity (most of which is the delivery, thanks eversource). I'm work mostly from home now. That being said, hot water is included in my rent so it would likely be higher if it was included.