I can't give any first hand advice on taking the spice. It appears that often heads around here put the spice in orange juice to convert the freebase to citrate.
Regarding the extract, SWIM takes it in gelcaps. She told me that she thinks 1g of the 50x taken alone with at least 4 hours set aside would make for a good introduction, if you have enough for that. Be cool, be well!
PK Dick is to LSD as HP Lovecraft is to Mushrooms