This is always great advice, but the OP (and others new to red dot sights) should regard this as desirable, but not absolutely necessary.

One of the many benefits of a red dot sight, especially in action shooting, is that the POA/POI will be the same whether the dot is in the center of the view field or way out on the perimeter.

I know nothing about UTG sights, but I have eight (8) red dot sights from various manufacturers, several of which are not particularly expensive. (Starting at $70ish.) All retain their horizontal POA/POI alignment no matter where the dot is on the glass. Naturally, the vertical alignment varies with distance as affected by trajectory. But this is related to ballistics and has nothing to do with optics.