unless your buying from some really fucked up people it isnt going to be laced. And you cant overdose so just smoke till you feel comfortable, I would also recommend smoking alone for your first time just doing your usual thing, listening to music or watching tv or whatever you usually do at home. I found that it was easier to get a feel for it smoking alone my first time. Also doesnt have the distraction of friends so you really get to enjoy it, and once you are high theres nothing stopping you from calling up some people to go chill with.
i would say do it on your own first in your house if you can get away with it blow it out the window and spray freshner afterwards hold the smoke in and when you get stoned dont forget to put everything away
Thanx but i already tried. I did it on the porch in the open. Nobody was home to catch me doing it so it was cool.