How many shrooms do i have to eat to have a good trip?

yesterday me and two friends tried shrooms for the first time. we bought an 1/8 of shrooms, the guy i bought em from said that it was meant for two people. so all three of us went for a walk to the park whih would take about 45 minutes. we figured that would be enough time for the shrooms to kik in. when we got to the park i started feeling really nauseated. this lasted for about 15 minutes. when it went away i started to feel a light body high. nothing to serious. a little giggling here and there. my friends also said they felt different but nothing major. so then we began to walk bout to my friends house. my hand started to feel really numb and tingly. and when i looked up everything seemed to be farther away and then bak to normal. as we were walking bak we stopped to stare at the sky. the klouds seem to stop when we stopped and then move when we did. really strange but interesting. other than that nothing really seemed different. i dont think i ate enough. if not how muh more do you think i need to eat to have a really weird trip?