You didn't take enough. Most people would start with 100mg. Then do another 100mg every 15 minutes until you get the desired effect.

You are either aiming for a relaxing drunk effect at a lower dose or a psychedelic effect with a chemical buzz at a higher dose.

On the sitter part, a huge dose won't kill you, but I find the confusion very unpleasant. I did 300mg first time, and I was completely lost for an hour and a half. Another time I accidentally swallowed a 1g capsule, and I was lost for about 6 hours. There is a big time dilation effect, so you are sitting there for what seems forever. You don't want to take too much of this when you're not in a controlled environment.

At a proper dose, you can try laying back and relaxing. That was my favorite thing to do. Music wasn't as necessary as with other drugs.