Post a picture, otherwise we can't give you anything specific...but pretty much, put water in it, pack your herb into the bowl...light the bowl while sucking slowly, pull the slide out, then take your hit.
the picture didnt work. but here's a link to the picture. Marquest Calvin's photos - Lol its so small! Idk how to use it | Plixi
but weed in the bowl. cover the whole in the back with ur finger. inhale and light weed through the top. when the chamber is full of smoke remove finger from whole in the back inhale deeply enjoy