We are all multidimensional in the sense that most of us, if not all, are ambiverts – we are neither fully introverts nor fully extroverts, as we are usually somewhere in between the two polarities, and we may lean towards one end in some situations and towards the other end in some other situations. I think it is also true that the personality type profiles are limited because even though they may represent or match some or most of our individual traits, they may not be able to fully describe our uniqueness or represent the multidimensional aspects of ourselves. At best, the personality type profiles may help us understand ourselves in terms of why we may respond to situations differently from others in social situations, and at worst, the personality type profiles may unwittingly result in stereotyping or over-generalisation of people.
There have been situations in life in which I find myself opening up and interacting with people in social settings, and I usually tend to do that when I am comfortable with them, and sometimes it can also be easier to talk and get to know new people because in such social settings, everyone is eager to be friendly. I was googling about “infp introspective conversation” earlier on since I find myself leaning towards this particular personality type, and I found this article which I kind of resonate with on some ways INFPs can improve their social interaction skills. Like what the article says, INFPs sometimes over-scrutinise themselves and avoid small talk, and the writer suggests that sometimes small talk can be helpful when it comes to meeting new people because it can help them feel more at ease, and I agree with that in this aspect.
On the other hand I quite agree with this article that when it comes to determining between traits such as sensing and intuiting, “most people don’t fall at the extremes – they fall in the middle”. I also agree that people’s personality traits tend to change over time, so their MBTI types may change over time as well. I would add that people may respond differently to a similar situation they responded one year ago or five years ago. For example, when checking out a MBTI test earlier, I came across statements such as “You feel at ease in a crowd”, and for such questions, my answer may be “yes” in some situations, or “no” in other situations, as it depends on several factors such as the kind of crowd I am in, my general mood and disposition during that time, and so on. I agree with the conclusion in the article that “finding out my personal strengths and weaknesses is a process that can take a lifetime, and is most likely not going to be reflected in any one set of numbers from a personality test”, and such tests may only serve as a useful tool or guide so long as I am aware of their limitations.
“I am large, I contain multitudes.”
– Walt Whitman
Real Rest is the Best 
I think you’ll find that quotation is from the Bhagavad Gita rather than Walt Whitman