Need help coming out

I'm 18 and the past year I've fell into a depression.Me and my mom have gotten in fights mor frequently and fill a lot of it has to do with me hiding my sexual orientation. Today me and my mom got in a fight she was angry. She was snooping on my phone and I think she might have found gay porn or something.I need help coming out mom goes to church but isn't very religious. I need help on coming out I can't live a lie anymore. I try putting on a front that I'm straight but its hard and I no longer want to do it. I want to be to myself i could use some tips. Thank you