Doggy is good or not. Certain sources said that doggy style harmful......

Is good. If this is what you and your partner like. No matter what you do, some misguided soul will put something on the internet to scare you. I'm sorry the world's become like this. Your doctor's a good guide for you at this stage in your development. Even dad might be able to tell you a thing or too. Love well and wisely.
Doggy Style. This is a great question for this format. Sexual intercourse is generally very safe from dangers or damage, regardless of your position or positions. But, good communication with your partner so that if something hurts then repositioning or changing speed and depth of the intercourse can help to find that pleasure that comes with good sexual activity.