Get your diet straight, hit the gym hard NATURALLY for some time. Get some supps form the AF store or cheapvitamins to speed the results. Not trying to flame ya bro. But you aint ready yet. If you had been in the gym like you should be, you would have a much different look. Especially at your height. Your diet is not in check, your training probably isnt either. Or at least hasnt been for very long. You'll waste a lot of money and stress on your body for a little bit of results that you will lose very quickly because your diet and training are not on point now and they def wont be after you get "off".
That being said...Since I know you probly wont listen to anyone cuz your mind is set. Go with anavar.
But you wont be happy with your decision in the long run. Good luck.