Congratulations, man! I'm glad you're getting that support. I deal with anxiety too, and I really want to come out on FB as well. I changed my pronouns to male, but I haven't taken any actions that will cause anyone to notice unless they go right in and look at my profile. I also haven't posted any pictures since I started presenting as male (not that I took many to begin with).
I think that might be my next step. Seeing that you've done it and been supported has given me some courage and hope.