If you're an introvert, then you'd understand how almost impossible it is to socialize more than already done, talk much of taking tips to improve on social behaviors. This is because most of the recommendations i've come across as tips on the said subject involves everything disliked by an introvert. That there is the major problem why it almost won't work.
Regular physical engagements like group outings and others are red flags for introverts. It is in their nature and not much can be exercise to undo such character or personality, correct me if am wrong, as they say, change is constant
The only possible way for an introvert to engage more in social activities is by doing so anonymously or behind the cover of some device, like am doing right now on answeree. Using this model, an introvert feels more relaxed as there's no prying eyes to cause any physically unnerve. But to what good is being social without physical contact? Anyways, that's what the world is gradually turning into.
Technology and today's social media is slowly turning the world into one big introverted community.