"Early impressions are hard to eradicate from the mind. When once wool has been dyed purple who can restore it to its previous whiteness?" - Jerome
Where does your first impression of someone come from? The Bible tells us that a Christian has a new mind when born again. However, the Christian also carries a second mind - a remnant of the mind of the flesh. It is this second mind that is at work under the radar from the moment we wake up in the morning. The main job of the second mind is to prioritize what is valuable and worthy to the flesh for the day and the many weeks to come. The second mind also "sizes people" up and places them into worth categories - James calls this "evil thoughts" - v.2.4. It is the renewed Christian mind that "resizes people" and re-sorts them into worth categories according to the word of God.
Let's see how your second mind has been at work. Who are in each of your concentric circles of relationships? Where are the people of need located in those concentric circles - are any in your inner circle? If you do not have people who gives you no advantage (but rather puts you at a disadvantage) in this world located in your inner circle, you are likely the one at a disadvantage in the Kingdom of God. It is not the early fleshly impression that matters, it is the lasting impression through the Holy Spirit that matters.
"And the King will answer them, ‘Truly, I say to you, as you did it to one of the least of these my brothers, you did it to me." - Matthew 25:40
It is not the people of need who has to have you in their lives - God can provide through other means. It is you who needs them to make your life full, rich and happy. Don't stop resizing people up for the glory of God and pray that your inner circle life is full of truly "rich" people in Christ - v.2:5. Your very happiness in Christ depends on it.