How do we know God's will?

Matthew 6:33
But seek first His kingdom and His righteousness, and all these things will be added to you.

3 John 1:2-5
2 Beloved, I pray that in all respects you may prosper and be in good health, just as your soul prospers. 3 For I was very glad when brethren came and testified to your truth, that is, how you are walking in truth. 4 I have no greater joy than [a]this, to hear of my children walking in the truth. 5 Beloved, you are acting faithfully in whatever you accomplish for the brethren, and [b]especially when they are strangers.

Romans 2:7-8, 10
7 to those who by perseverance in doing good seek for glory and honor and immortality, eternal life; 8 but to those who are selfishly ambitious and do not obey the truth, but obey unrighteousness, wrath and indignation 10 but glory and honor and peace to everyone who does good, to the Jew first and also to the Greek.

There is no one true answer. But God told us if our heart is good, and if we seek His kingdom and righteousness, and if our soul prospers, then God will be with us and make us prosperous. Are you walking with God? Is your motivation and heart pure? Are you leading a balanced life? Holy spirit led life? Then probably, God will be with you in your decision-making, and make you prosperous for seeking His glory.