Druidism has a really loose belief system and offers a couple of options for you to choose from: mono, poly, and pantheism. I reject most "god-like" things, but I think I could become something of a pantheist (the universe is God).
I don't believe any religion knows what happens after you die, and frankly I don't really care. We aren't supposed to know, it's the great mystery, and instead we should focus on ensuring everyone lives their best life. Druidism has a theory about the after life and how you go through various lives until you become a good person, but it's not something I spend time thinking about. As an aside, Iris DeMent's song Let The Mystery Be perfectly describes my thoughts on this: https://youtu.be/0gQVS2fCsek