I don’t know. I think it’s very similar to a number of them; known collectively as “Mainline Protestant” – Methodist happens to be the biggest – and happened to be the one non-Catholic Christian church in town growing up.
closest to Russian- well, actually, it’s most akin to an American encountering Orthodox internet culture in the mid 1990s and finding ‘zines from an Alaska monastery publishing house contrasting with local priests who “weren’t as true” – an American with a standard new convert syndrome for some time. I was going to be better than the rest of them, etc.
Wikipedia gives a decent representative list; anybody from one mainline protestant church would likely feel comfortable attending any of the other mainline protestant churches in America because they’re all really similar in worship and theology.
American Baptist Churches
Christian Church (Disciples of Christ)
The Episcopal Church
Evangelical Lutheran Church in America
Presbyterian Church (USA)
United Church of Christ
United Methodist Church
are in there as the most common, but there’s dozens of others listed as well.