You're XSFP.
I don't know that you come across as a hardcore introvert.
You're a performing musician afterall, right?
Therefore you must get some energization out of exposure to people.
I know I was pumped after every gig I played in when I was younger.
If you need time to recharge a bit afterward, well then maybe you're an Ambivert.
Near balanced on N/S is my guess, but with a slight preference for S.
You don't talk in metaphors.
You offer good quality, concrete information on a myriad of subjects.
If I threw a soccer ball at your head, would you catch it? If yes, then Sensor, if no then intuitive.
If I threw a soccer ball at your head and it did hit you, and you got mad, then Judger.
This is an old test of Jock the Motie's I thought hilarious, but actually quite practical.
T vs. F, my first check on that is how "aloof" someone is IRL.
I'm emotionally detached, observant, matter of factual, not at all riled up by much, but energetic as hell on my own.
T/F has nothing to do with your capacity to think logically, nebbykoo made a great post on this a while back.
However, you seem to have more F than T traits from reading about your opinions, motivations, etc.
You're definitley not a judger from what I can tell, you're laid back and cool, Bro.