Remember that you are dealing with the director's vision of the play. A knowledgeable director has a certain vision or style in mind for a production. Age is rarely a key factor in casting decisions. Talent is always a key factor in casting decisions. Chemistry with other actors is as important as talent.
Any theatrical experience helps an actor be more aware of talent and chemistry.
Nepotism has no place in this theatre. If you think you are right for only one role, you are liminting your chances of being offered a role. You are not ensured the part you want because you have played the role before. Hints for Auditioning Actors Get as familiar as you can with the script. Practice reading aloud .