Saffa, first off I wouldn't worry about the scars so much. Like the fella's have said, there are ways to make them less protrusive, and you should look into those options.
Second, just shave your head and be yourself, put it out there. Better to be natural, and you can possibly be of help to some younger guys who may be going through just what you have.
Third, be careful with your opinions on the rainbow meaning, we have quite a few bro's here who may not take it kindly.
Enjoy the forum, man up- get it smooth and stand tall and proud, and get a picture up, like Ming says.
