I personally had intense experiences pretty quickly but didn’t overdo it after. I (now) have a healthy respect of psychedelic experiences.

As another commenter said, don’t overdo things.

Edit: whether you get more intense experiences likely is some function of how stable and sensitive you are, what other experiences you already had and how much you meditate.

I imagine that very grounded people don’t get problems as quickly. That’s a good thing, not shallowness.