The first question is whether you can be strongly against humanism and still be a member of the community. I've seen a lot of people mention humanism as one of the main things to do with the community but I'm not a very big fan of humanism.
The second question is what's the community consensus on hell? A lot of the faiths that are common in Unitarian Universalist community have some concept of hell but I imagine it would be a bit of a taboo subject to talk about.

I really like praying for stuff and the idea of heaven and it gives me a lot of comfort and happiness but I haven't been allowed to join any Christian sects because they all said the rest of my beliefs aren't compatible with their religion. I like stuff from Gnosticism, Taoism and Buddhism too, mostly the stuff that relates to philosophical pessimism and individualist stuff. I really like reading philosophical nihilist, pessimist and individualist books and philosophy and it comforts me as much as my spiritual stuff but my issue is that almost no spiritual communities tolerate those sort of beliefs. I wanted to know if I'd be allowed to join a Unitarian Universalist church or community to pray in and find people to make friends with because I'm worried they would turn me down too because some of my beliefs go against things that basically every religion agrees on.