Shalom, In order for non Jews to go to Heaven (Gan Eden) and have a place in the world to come, all they need to do is follow the seven laws of Noah. There are much more then 7 laws, rather it is seven categories. You can find a detailed list on this page www.atzmut.com/the-seven-laws-of-noah Besides following the seven laws, they must do acts of kindness and charity and behave morally with all man kind. It is recommended for non Jews to learn these laws and make sure they follow them and that will secure for them a place in heaven and in the world to come and also to be part of the coming redemption.The only truth is the Torah, any other believe and all other religions are made up and not true. Non Jews are also obligated to believe in ONE G-od, and follow their Mitzvot that were given also in the Torah. There is enough sources to prove that all other religions are false, and hundreds of thousands of non Jews have figured that out and changed their path by either converting to Judaism or became Noahides. Wishing you great success on the right path