T3 should not be used unless you are also on gear of some sort as you will lose alot of muscle. Clen is a fatburner that is stronger than the over the counter ECA so considering that it is not recommended that you use ECA at your age clen should not be used either. You are new to the game and an incredible amount of progress can be made with proper diet, hard training and some cardio. A good multivitamin and lots of water. Consistency is the key.