Taking psychedelics won't bring you happiness (only you can make yourself happy). At most, you may realize certain things and that will bring you peace/happiness.

Be honest with yourself, keep it real, do your research, and you'll be fine. Having a sitter, preferably someone experienced with psychedelic states is not a must, but highly recommended. I started my explorations without one (there was nobody that was into psychedelics and close to me at that point) and went through some rough trips alone. In the end it made me stronger but during the actual experience, it was no easy peach.

Welcome to the Nexus and best of luck in your future journeys. We're here if you need anything.