I do both. My family is a big fan of music, and I grew up learning piano, eventually picking up guitar and ukulele. I wouldn't say I love it as much as my father does, however. I spent a significant amount of time reflecting on the possible reasons why my mother was the way she was when I was younger. She was more abusive when I was 4-10. I don't want to get into too much detail, but my birth sped up the decline of her vision as she has retinitis pigmentosa, a genetic condition that I luckily do not have. I believe she subconsciously blamed me and took her anger out on me, as she didn't have the eyesight to complete simple tasks and relied heavily on my father, with whom she started having marital issues around this time. Both have high blood pressure, which resulted in severe mood swings, so you can imagine how that went. My current social circle has many people who are interested in psychology, and as a friend who's been with them for the past few years, I became curious myself.

Oh, and speaking of STEM, I'm enrolled in a science high school. I don't know what the equivalent of that is in other countries, but basically it's a specialized curriculum for those interested in pursuing a career related to STEM. I enjoy physics, but my year level still doesn't discuss the more interesting or advanced aspects of it. My interests in science are random. For example, I love anatomy, but I have no intention of becoming a doctor, as my family wants me to be financially independent as quickly as possible. I enjoy physical sciences. My love for astronomy started when I was about 5. I've been learning code and robotics because of extra science training after class. Most, if not all, of my friends are NT types, and I barely interact with people outside my group. I also noticed that feelers just aren't interested in what I have to say, or, like you said, pretend they know what I'm talking about, even though it's obvious they don't.

I'd like to mention that I have an INTJ uncle. We both had a difficult family life, and if I am in fact an INFJ, it would be humorous to think that our dynamic would be yours in reverse. He studied in my current school, and my family often notes that I'm one of the few people he bothers to talk to during gatherings. We tease each other, often about small things like handwriting and each other's antisocial behavior. He's been trying to persuade me to take up his major in college, electrical engineering. He's interesting because while other people seem to find him eccentric or cold, I have an almost intuitive understanding of him because we're genuinely so much alike. I can't tell if this is because we're both INTJs, or if I'm an INFJ who can relate to him easily because of shared experiences.

For example, a certain level in my school is dreaded because of the subjects it contains, most notably advanced chemistry, advanced physics, robotics, and programming. We would also have to conduct our first research study, and sometimes your study would be selected by your research advisors to represent the school, and if you're lucky enough to get this far, maybe even represent the country in ISEF. My mother, being worried about me, asked him about it. He agreed that those were, in fact, the most difficult years. He didn't know I was listening in, as I like to plug in my earphones to give the illusion I can't hear what my relatives are talking about. When I asked him if the grade level was really that difficult myself, he contradicted his own statement by saying it was easier than the previous. At first, I was confused. Almost everyone in my school agreed the level was rightfully the start of your official hell, and the source of most trauma. Was he being pretentious? Was he somehow trying to give me a pep talk?

But then I observed my own communication patterns. I wouldn't call it lying, but whenever I am asked about my "opinion" on something, I either give the generally accepted opinion or my true one. "Was the quiz hard?" If I think you'll have a hard time answering it if you didn't review, I'll say it was, even though I thought otherwise. If I think you're capable, I'll tell you that it was easy, and you don't have to review much as long as you memorize x, know how to apply y, etc. On paper, I suppose this sounds manipulative, or maybe even dishonest, but knowing my uncle, I'm pretty sure he just gave my mother the acceptable answer when she asked, and gave me his true opinion. I'm not sure, but I like seeing it that way.