This will continue until we all come to such unity in our faith and knowledge of God's Son that we will be mature in the Lord, measuring up to the full and complete standard of Christ. - Eph 4:13
I wasn't born into God's family as a matured Christian. But over time, by exploiting God's grace at work in me, I moved away from immaturity, especially having been taught to desire the sincere milk of the word of God. Hence, I am on a journey to full maturity in Christ and to conform to His image in all fullness. It bears mentioning that immaturity is not blameworthy as a new born babe in Christ. What God disapproves of is a Christian that is stuck in immaturity. If you are not studying God's word to show yourself approved unto God, especially after your new birth experience, your status as a Christian would certainly become stale and unfruitful. Also, if you are not praying in the Holy Ghost to build up your most holy faith, especially after a considerable time has lapsed from your new birth experience, you would be shortchanging yourself of divine signals and benefits accruing from connectivity to God's network of divine resources.
Therefore, the best way to get off to a flying start as a new born babe is to earnestly desire the sincere milk of the word of God. It would certainly keep you on a growth path while deepening your understanding of God's principles. You can give evidence of your readiness of divine sportsmanship, as a true disciple by choosing to sit continuously at the feet of Jesus, to enrich your knowledge of kingdom principles for victorious living.
It goes without saying that the Lord God won't be pleased with you if you are still feasting on milk after a reasonable time has passed from your new birth experience. Know that immaturity makes you highly vulnerable to devilish schemes which could lure you back to your past life, make you undermine your fellowship with God and the brethren and refresh your appetite for inordinate pleasure and affections that weakens your connectivity to God's network of divine resources. Hence, you need to get off immaturity in the things of God if you earnestly desire to attain to high spiritual altitude where the devil cannot intercept your fellowship with God. Henceforth, stick to a bible study plan and earnestly hunger for the baptism of the Holy Spirit. As you journey in your walk with God, may you run and not be weary; walk and not faint in Jesus name.