Much of what you describe isn't part of being introverted at all.. in fact introversion is very commonly attributed to traits that have nothing to do with it.

I agree if you have a lot of difficulty speaking in public, making friends and socializing that the above things may help. But those seem to be more attributed to social anxieties and not introversion.

Some clarifying information is here:
https://blogs.scientificamerican.com...ease-stand-up/

Also your description seems to frame introversion as kind of a problem or disorder which it is not, it's a personality type.