Welcome mate! I'm in my twenties too and have decided that I definatly shouldn't ever drink alcohol. The age thing can be a bit of a nuiscance but think of it like this, you've caught this problem before it gets any worse. Obviously it's always your choice but I want to bring your attention to something you wrote in your first post
"I have done 30 days a year ago though and still cant control myself when I have alcohol."
That's almost exactly what first alerted me to the fact I have a problem (Back when I was 23 coincidently!) And I WISH I had done more to educate myself on what was happening to me and what I was doing to myself.
The fact you've posted on here is fantastic my friend, you did the right thing. 50 days is a great start. You will learn a lot about yourself
Keep posting and get reading!
I wish you all the best