Spiritual growth isn’t about how much information concerning God that you know. It’s about how much of God’s love that you show and how much you allow the Holy Spirit to flow.
Spiritual growth isn’t about how much theological and/or religious knowledge that you accumulate. It’s about how much you acknowledge God by surrendering to and obeying His voice.
The way to grow is not to intellectually know. It’s easy to have lots of Biblical knowledge, but little (or no) spiritual life.
The way to grow is to go and act on what you know. Show God’s love to everyone you encounter. Let the Holy Spirit’s flow direct your thoughts, your emotions, and your behaviors until you glow with the glory of God.