You have neither the knowledge nor experience to consider breeding your budgies.
Rearranging their cage frequently, and limiting the light they get to 8 hours a day will help tremendously. Please be sure you never put a nest box or anything that could be used as a nesting site in their cage.
When they come into condition, limit the amount of protein in their diet at that time.
You need to read the information provided on the forum in the stickies and the budgie articles.