Up to you really. Isnt it best to get used to it first before doing higher dosages? It's my favourite drug and the first time I took it, I was just doing key bumps to get a feel for it.
smaller doses made me feel drunk and wobbly, then I began making small lines, which sent me into a hole with it being my first time lol! Love at first sight...or sniff.
favourite things to do on it... watch films (3d films are mind blowing), lie in bed listening to music, solicialise on smaller doses (you can end up looking crazy if you overdo it in public).
Enjoy