Ml = milliliters. That is a unit of volume.
Mg = milligrams. That is a unit of mass.
Drugs are measured by their mass.
How much anavar did you use per day for the 6 weeks?
Yes you should be doing PCT, especially at your age. No, you dont need an AI.
You are in what I call 'the hand holding stage'. That is the only reason I am answering your extremely basic questions. But I dont think its fair for you to expect me or anyone else to answer your next question: "What do I do for PCT". Read the stickied threads. Or better yet ASK YOUR DAMNED FRIEND
STOP PUTTING DRUGS IN YOUR BODY.