You grow spiritually by engaging in spiritual disciplines. First though you must be saved. You must repent of your sins and accept what Jesus did on the cross as payment for those sins. You must also accept Jesus as Lord. If you accept Jesus as Lord then you'll do what the Bible commands. It's not enough to know that Jesus died for you. Salvation is a like a gift. It's not yours until you consciously accept it.

These are the spiritual disciplines necessary for spiritual growth:

You should pray everyday. Don't recite the prayers of others or the prayers in the Bible. Pour out your heart to God. I pray using the ACTS model of adoration, confession, thanksgiving, and supplication.

Read your Bible everyday. Read at least one chapter a day. Start in the New Testament in Matthew. Read the entire New Testament. Then read the Old Testament.

Go to a good Bible believing church where the pastor preaches from the Bible accurately. Attend regularly.

Learn to apply what you know to your life. Real spiritual growth comes from obedience.

I like to listen to scripture based Christian music. I listen to music that moves me emotionally and feeds me spiritually.

I also sometimes listen to Christian podcasts. My favorite is Thru the Bible. You can listen online or download the entire five year program for free at ttb.org.