There IS a Noahide faith. It is based on the covenant G-d made with Noah. There are 7 Laws Noahides live by. Noahides share some similarities with the Jews,such as Torah and the writings of the prophets. Did you even bother to look it up?
Christianity is Pagan and idolatrous.
You can make up all you wish, but YHVH left his word to declare the only way to eternal life, and Noachide nonsense is not it.
That is of course a problem that you’ll have to deal with.
Chaio!