@DH
It was pretty instant. Like I made the decision that shit didn't matter unless I'd do this, because I'd lost to someone, which I couldn't take. So I was like FUCK IT. It also helped a lot that I had a friend who turns out is also ENTP to learn from and I also got support from another friend on personal matters that required being extroverted. While I was INTP I used to silently hate people and think I was above everyone else, but then when I became ENTP I suddenly realized that I could be very charismatic and say anything to anyone without any bad consequences as long as I smiled and seemed sincere, so I thought "holy shit, I really am above everyone else." That's not true, of course, there people who are above me, such as Bloo and DD, for example, because they can actually do things, instead of just coming up with things to do.
I miss being INTP, because I was feared and respected. Now I only have a lot of friends. But I used to need my alone time when I was an introvert, whereas now I don't need to recharge anymore, I just need motivation. As long as someone tells me that what I'm doing is wrong, I can keep doing it forever.
EDIT:
"This becomes especially apparent when INFJs find themselves up against conflict and criticism – their sensitivity forces them to do everything they can to evade these seemingly personal attacks, but when the circumstances are unavoidable, they can fight back in highly irrational, unhelpful ways."
See Bloo, the next time you feel like you're being attacked, just let me handle it. I can fight back in highly irrational and unhelpful ways without feeling bad about it.
EDIT 2:
Also I like this song.