I haven't tried to alter my personality, but I've tried to intentionally act different in certain social situations by adopting kind of a trolling mindset and p

I haven't tried to alter my personality, but I've tried to intentionally act different in certain social situations by adopting kind of a trolling mindset and pretending I was playing a character. Think of it as an acting rather than social exercise. Maybe you get better at being more naturally outgoing with a bit of indirect practice.