“Hi there nice to meet you. Would you mind sharing your pronouns so I can address you how you’d like to be preferred?”

Then respect whatever answer you were given and refer to them that way.

It’s not hard to support people’s identities, it just requires caring enough to respect them. You don’t even have to like it yourself. But if it seems really hard to respect a person’s identity it’s almost certain the problem doesn’t lie with them or their identity.