How can i educate/help grieve my parents

Well, i came out yesterday. They...tolerate it, but they:1- dont quite grasp the concept of bisexuality 2- Think gayness leads ONLY to drugs, alcohol and a ruined life (to be fair, that's what they have experienced and there is a large degree of gay people who do follow that path) 3- think i'm naive (in general, not just about this. I am to some degree but nowhere as much as they think) and unneducated on the matter and that i am putting myself and my family in danger by socializing with gay men 4 - use the "internet is full of wrong stuff" argument when it helps them 5- think gay is a choice to some degreeI live in Venezuela which isn't the most gay friendly country down here (we're busy trying not to starve/get killed to evolve that aspect, Yay communism :/) although it's not Saudi Arabia either. Living on my own isn't an option either (again, shitty country) so there is that too. I know they will need to go through the grief process (specially mom) but i wanna help them to make sure the result will be positive