The word 'ministry' means service. Every Spirit-filled believer is called to serve the Lord. There is no such thing as 'the ministry,' as though it is some exclusive group within the body of believers. The only issue is the specific manner in which a person is to serve. This is determined by a person's gifts, experience, and willingness. You should speak to your spiritual leaders about what gifts they see in you and how those gifts could be put to work within the local body. Keep in mind that gifts must be developed over time, so be patient.