What does first mean to you ? What do you think or do first when you wake up in the morning ?
Let us look at the Bible.
Here is what the Lord Jesus says in Matthew 6:33 But seek first the kingdom of God and his righteousness, and all these things (needs like food, clothing etc.) will be added to you.
In verse 34 Jesus continued " Therefore do not be anxious (worried) about tomorrow, for tomorrow will be anxious for itself. Sufficient for the day is its own trouble.
Comment: I believe we can plan with hope based on the word of God but we are not to be worried. If we are worried then let us pray that God help us overcome our unbelief. Worry does not come from God. Trusting God will take care of our worry problem. Trusting God also means obedience to Him.