Just got prescribed adderall. Wtf is this stuff?

I just got prescribed adderall today, 20mg once a day. I just took it for the first time and I feel like a totally different person, is this normal? All of a sudden my brain shuts the hell up, I focus on anything and everything, and I have a boost in confidence and less anxiety? What is in this stuff? Not to mention I have this overwhelming sense of euphoria on top of the focus feeling? I’m not sure if that makes sense but dude this stuff has brought a totally different outlook on life for me, all of a sudden I’m riddled with confidence and focus? I’ve never been that way, I’m just wondering if this is like normal? All responses are appreciated and thank you so much for reading.