Yeah, I was raised Catholic, which is basically polytheism, imo (I was taught to pray to St. Christopher for lost things and to St. Jude for cancer patients, asking them to talk to Yahweh for me, but I was also taught to pray directly to Mary, which nudges it over the line for me- that’s not even addressing the trinity issue), and that’s definitely Christian. I’ve heard some Baptists say it isn’t, but they’re just wrong and spreading antipapist propaganda, even if unintentionally.

I was also taught that there are three extant sects of Christianity: Catholicism, Orthodox Christianity, and Protestantism (edit: not sure where Coptic Christians fell, but I suspect Orthodox). Jehovah’s Witness and Mormons are technically a type of Protestant (at least according to the Catholic Church), though I get how they could feel separate (and separate from each other). Quakers, Shakers, and Unitarians are also Protestants and also feel like their own thing, but in a very different way.

Lutheran, Episcopalian, and Catholic church services/masses all feel basically the same to me, except for transubstantiation of the Eucharist, which Protestants by and large don’t believe in.