yeah i also heard that the acid in orange/lemon juice helps your body to absob the psy quicker.....it seemed to work for me....
id say take a g or 2 and see how it goes, get a feeling for them etc etc
then wait a couple of weeks or month or 2 (so your tolerance goes right down[it goes up EXTREMELY quickly])and do an 8th or so the most I have done is 4g's and i tottaly tripped out....like totally different world etc etc....but yeah thats my advice...sorry it was a bit rushed got shit to do

hope it helps