Seek 1st the Kingdom of God?

Matthew 6:33 But seek first the kingdom of God and His righteousness, and all these things shall be added to you.
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Question: What is the kingdom of God?
Answer: Serving? Mission? Doing things for God?
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Romans 14:17 For the kingdom of God is not a matter of eating and drinking, but righteousness, peace and joy in the Holy Spirit,
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Now I know what is "seek first the kingdom of God! Is to seek Righteousness, which I have in Christ Jesus, and Peace and Joy in the Holy Spirit!!! All these while I thought I have to serve, do mission, and do this and that to seek first the kingdom of God then all those blessings will be added to me! No, but is to seek first the righteousness in Christ, and peace and joy in the Holy Spirit!!
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Thus, Seek First the Kingdom of God is to make sure Every Day I know I am Righteous in Christ and my heart is in Peace and Joy in the Holy Spirit!!
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(This can also be a challenge, as I'm not a joyful person and always not in peace! Ha Ha! *Difficult Bim*)
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Have been blessed and set free by listening to sermons on Grace of God! My Walk with God is, continually, set free from Religiosity (must do this and that to please God & seek His kingdom, if not I'm Sinning, etc etc). "Religion" has put me in bondage all these while. I am not a strong person (I'm tofu) to do this and that for His kingdom, thus, led me to self-condemnation.
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Thank God for His words, Thank God for the people whom He raises to expound on His word!
Thank God for J. Prince, through him, I can understand God's heart and Word more, and more!
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(When one have the righteousness in Christ and the peace and joy in the Holy Spirit, surely serving and doing mission are the natural "act" rather than the Qualification to be Blessed).