You dont 'get ready' to be in a relationship. Being ready to have a relationship means you are emotionally mature to care, love and commit to someone. Emotional maturity comes with time, experience and learning about life and about yourself.

Nothing wrong with waiting a bit and when you feel you can love, care and commit to someone special (not think about other relationships, girls, possibilities, and have that excitement feeling of being with your special someone) then you will know the time is right. Then having sex is part of a loving committed relationship.

In my opinion having sex at 16 is too young in those terms of emotional maturity. There is no harry you know.