Hi fam, first of all, thank you very much for helping the LGBTI+ community ♥️♥️♥️.
We cannot give you exact information on how to help him because it would depend on his country of residence, but these are some of the foundations that are dedicated to help LGBTI+ people around the world, many of them have chat rooms in which they will be be able to help more directly

https://www.hrc.org/resources/direct-online-and-phone-support-services-for-lgbtq-youth

https://www.belongto.org/youngpeople/help/

https://www.thetrevorproject.org/resources/article/resources-for-international-lgbtq-youth/