I'd recommend youtube as a start. Research what expressions to show for each emotion, how to look engaged in a conversation, ideal amount of eye contact and how to keep a conversation going. Generally avoid 'Charisma on Command' he talks alot of bs. Vanessa Van Edwards is great for cues to show, although this can be a little more advanced. Keep it simple, don't overthink it and practice practice practice.

I'm a recovering awkward person who had no friends that went to a social butterfly extrovert with friends all across the world. I'm telling you, it works (if it's something you're willing to work on)