Good question. Let's establish what the Kingdom is. . .
Jesus said "My kingdom is not of this world", and we're told in Romans that "the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost."
Other scriptures tell us our life is hidden in Christ, and that when we dwell in God's secret place, we dwell in his shadow of protection.
Learning to pray is vital, and not difficult - get into the practice of talking with Him constantly, about anything or everything. Acknowledge his presence with you through the mundane things of everyday life. Learning to remain in Gethsemane is good, too, as it changes us through forfeit and submission to his will. Learn to trust that he's in control. Jesus warned that to tightly cling to our life can actually ruin it, but a willingness to yield it will increase our life (Matthew 10:39)

Simply spending quiet time learning to be still and listen to Him is my best advice.