You will know about the data base inside and out side before becoming a data base administrator. For that you have to work with Information Technology Company which you are interested in and the software of data bases which you are familiar with.
Go through the operating system and the data base which you are familiar with and interested about. This will get through design, implementation of your data base and a specific education courses. Search and find the books of DBA which are running the data bases in an appropriate operating system. Let your company to know about your self and you want to become a database administrator. Let them know about your talent and know you can do excellent in working. Take care of any of the administration and maintenance tasks which come up with more security and most back up's. When it concerns to the information technology, act in the capacity of the information technology persons. Make sure that the users who are authorized were only accessing the data base. Various users are having various access level of data base.
Continue this job in your field and make a good performance in your task. Let your senior staff members know that you are just not interested to become a database administrator, but you are made for this job. This job perfectly suits you and you will never be wrong if they choose you for higher position to perform heavy tasks.