I'm not sure that's a good approach to the issue. Don't label other people with a pesonality type and then try to engage with them based on the label.
I think I would actually recommend this. If other people are deeply mysterious to you, then reading up on personality types and trying to recognize them in the wild is helpful training and theory.
The trouble is twofold:
The theory will be incomplete, and only give you broad understanding.
The theory will be limiting, in that you will be more likely to notice observations that match the theory than observations that do not agree with the theory.
You can ameliorate both troubles by learning multiple theories, and trying to hold them in your head / evaluate people along different ones simultaneously.
(There's a longer conversation here, about how much learning should be system 1 vs. system 2, and how to tell what level of development you are in a skill, and so on, but that's probably enough for now.)
You might be able to do a bit better; learn a simple and catchy system like the True Colors personality spectrum (a simplified adaptation of the Myers-Briggs), and work on understanding why it works. (Or if you like, why it "works".) While you might guess someone's 'color' incorrectly, if you understand why everyone identifies at least a little with every color, you can start to use general, positive statements to identify what people like about themselves. It should be a productive exercise in understanding the average person's self concept.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.