Like I said, do yourself a favor and take two. If you wanna see stuff, definitely take two. I took two my first time, first hallucinogen and it wasn't so strong that I started freaking out or didn't enjoy it. Granted, it was that potent of stuff, but anything you get off the street will be low on the potency side. Unless you know someone that is real close to the direct source aka the dude making it.
Just remember this always, be chill and your trip will be chill, enjoyable and insightful. The moment you see something and go "oh shit, I don't wanna see that or think about that..." thats when the acid consumes you. Do not be afraid and your courage will guide you.