Should I come out on my own or with a friend present?

Hey all

Sooooo I'm out to my father and I's best friend, she's a big part of our life. She's really open-minded about LGBT+ issues, and so has accepted me without a thought.

My father often tends to be less open-minded, thinks that all trans people have mental health problems (not gender dysphoria), believes that bisexuals are just desperate and will sleep with anyone, and is a former Jehovah's Witness.

He thinks trans people just obsess over their bodies and are just full off themselves. Anyone who has met me knows this isn't the case.

So, is it a good idea to come out when our friend is around? I did this when I told him I have depression and it worked out OK.

Thankyou all