From New Born to Mature Christian
Firstly; to become a Christian You must be born again.
Secondly; Once you are a Christian you must next Receive the Baptism in the Holy Spirit in order to; be an effective witness for Christ, overcome temptation, and fulfil the works God has prepared for you to do.
The New Birth, then the Power Baptism
They are the basics, but what comes next?
Simple, you grow up in Christ.
Just as a human baby is born helpless and immature, and then grows rapidly; so a new born Christian needs to grow quickly and mature spiritually.