Hello, my first time was alone. It was an amazingly eye opening experience, no sitter, sometimes a sitter can make things worse. Especially a square or sober person. If your already having anxiety, bad thoughts then its likely to amplify. Set and setting is key. Somewhere ur comfortable and can do whatever the fuck u wantn. Unless ur sitter are one cool motherfucker with experience in psychedelics/hallucinogens who can sit n get blazed with you while u trip nutsack. Help guide you through it. As he will know what to do if things take a turn for the worse. Which they wont even alone, if you follow a few simple rules. Immerse your self in the trip. Embrace it and dont try distract yourself to watch movies etc. Psychedelic photos on the big screen with some music like shpongled (that music was made for tripping. They have some really cool album art too)just sit back and enjoy the ride. TIDY UP. Dont waste your trip re arranging your living room. I reccomed listening to music on some really good headphones too. Really feel the energy of the music around you. Notice the beauty in everything. DO NOT TAKE IF YOU ARE HAVING A BAD TIME IN LIFE OR HAVE A HISTORY OF MENTAL ILLNESS AND/OR IF YOUR STILL IN THAT SITUATION, the lsd might amplify your emotional state and can be hard to drag yourself out of it. And above all dont waste the trip staring photos and being like ' dude is that shit a video or a picture? I cant tell dude' .. We all do it. Im guilty of it myself. get a scetch pad , let the creativity in you flow out, let go of the ego. Ask questions about your purpose, the universe, creation of life, why we are here, and anything that you want to know about yourself.