Will prior alcohol problems and having gone to behavioral health when I was 20 hinder my shot at SFAS?

I have been interested in dropping a packet to attend SFAS however my platoon sergeant just returned and he said he was a psych drop due to behavior health history. I’m not sure if that’s a cover story or something and I’m also not sure the details on his behavior health history. I had some alcohol problems when I was 20 and went to behavioral health for it. I’m curious how much that would hinder my shot if at all