You can always take more. You can't take less. Tripping can be highly dependent on set and setting. In other words, on your current mind state, and where you are tripping at. Considering you are posting on here I assume you are depressed. There are no promises there. Just dont go into it being actively very suicidal. This is a recipe for PTSD. Benzos (xanax, valium, etc) are a trip killer so if you have them, use them for an emergency situation. Psychedelics can be incredibly healing, and they can also be incredibly scary. Lean into the experience. Do not fight it. Anyways its more likely you find everything hyserically funny rather than scary. The reason people say it makes them feel better, is because it allows you to analyze your situation from a different perspective and in a much more objective way.
Every psychedelic will effect people differently. However there are some constants. You may get nauseous on the come up. Especially with mushrooms. It is to be expected. If you are doing shrooms look into "lemon tek". Making a tea with the mushrooms powdered and then adding lemon and ginger makes it much nicer. Also be careful smoking weed while tripping. It intensifies the effects sometimes to a very unexpected level and can induce things like thought loops. I have done acid, shrooms, dmt, 2c-b, ketamine, and some other research chemical stuff. All in all psychadelics can be a great tools. Not to be misused.