How do you become a mature Christian?
How do you grow up in your faith?
Never stop submitting to Jesus as your Lord, relying on him to be sufficient where you are completely inadequate. You don't grow to become independent, you grow by learning to become more dependent.
"So then, just as you received Christ Jesus as Lord, continue to live in him, 7rooted and built up in him, strengthened in the faith as you were taught, and overflowing with thankfulness"
And now that you know your real life is found only in Jesus, never forget that! Set your mind on that new life you've got! Your appearing with Jesus in glory is dependent upon him and his resurrection, not on your talents. So make sure your mind is caught up in your new life in heaven.
"Since, then, you have been raised with Christ, set your hearts on things above, where Christ is seated at the right hand of God. 2Set your minds on things above, not on earthly things. 3For you died, and your life is now hidden with Christ in God. 4When Christ, who is your life, appears, then you also will appear with him in glory."