What does it mean to seek God's kingdom first?
I can't speak Malaysian so I will try to give you my answer in English.
The section you are quoting is from Matt 6:33
But seek first the reign of Elohim, and His righteousness, and all these matters shall be added to you. ISR
Since we know there were originally no chapter divisions, continued reading into 7 gives these paraphrased instructions:
1) Don't be anxious for things we hope to happen.
2) Don't "judge" unrighteously.
3) Don't give ("hang earrings on) "dogs" or throw/speak things of truth to "swine" (...use caution in our approach)
Verse 12 sums up the entire matter:
Matt 7:12 Therefore whatever you would mean that men should do to you, do you so to them for this is the Torah and the Prophets.
The "Golden Rule" the Torah and Prophets. This entails Torah observance. This is seeking the Kingdom.