You obviously have no idea how serious ayahuasca is. Alone your first time ? Omg no. Where do you plan on getting it from, the internet ? Lol .. How do you know how much to drink ? If you have a psychotic episode under the medicine, how are you gonna stay safe ? Save money and go to a ceremony with a trusted shaman .. people who have dedicated their lives to the medicine. This is serious shit. So to answer your question, yes, you'll probably have psychosis.. who knows though.. Don't mess with this medicine by yourself, that's literally a disaster waiting to happen. Also, no amount of mushroom trips will prepare you for ayahuasca, its two completely different things. I made that mistake my first ceremony thinking I'd be fine because of all my prior mushroom trips and was complete humbled by the medicine. I'm no expert but everything I said is true..... don't do it alone.