It sounds like what you want to do is seal your juvenile record. See the directions below.
Your Juvenile records do appear on your criminal record. Upon your 18th birthday, you are eligible to petition to have your juvenile records sealed. Once sealed, no one can gain access to them and they will be completely destroyed five years from the date of sealing.
Juvenile records are not automatically sealed upon your 18th birthday. You must affirmatively petition the juvenile court to have them sealed. You can do this by filing out a form and filing it with the juvenile court in the county in which you were convicted. Contact the juvenile court in the county you were convicted, and ask them to send you a copy of the form used in that county. Check to see if they have any special filing requirements such as additional photocopies or the need to serve copies of the petition on any government agencies, and get the correct information for filing by mail. Usually, there is no fee.
If you do not petition to have your juvenile records sealed and destroyed, they will remain on your record until your 38th birthday, then they will be destroyed.
This is a general discussion of legal principles by a California lawyer and does not create an attorney/client relationship. This is not intended to be legal advice in your specific case. It's impossible to give detailed, accurate advice based on a few sentences on a website. You should always seek advice from an attorney licensed in your jurisdiction who can give you an informed opinion after reviewing all of the relevant information in your case.
You should definately follow my colleague's directions and be proactive about the situation. Sounds like you have really worked hard to turn your life around and help yourself...good luck!