Bought used ping g440 irons with green dot

As title say I bought used ping g440 irons the other day, and these irons has a green dot, I have never played with ping irons before so im not sure if it’s right for me.

I have seen pings recommendations for what dot you should have based on wrist to floor length and I checked mine and it was 26 inches, im also 5’10 so im not tall by any means. However I could get these ones adjusted to black or blue, but im not entirely sure it would make a big difference? I’ve read that having the loft to much upright would make you shoot left and I have not had that result yet after 2 rounds with them but my shots have been both good and bad, however according to ping’s diagram it says its not the right for me.
If I were to change to black or blue would it really make a big difference?

For reference I played with Taylormade M4s before I switched to these and they were standard and worked well for me.

And before someone say that I should get fitted, I am a 27 handicap guy and based on what I’ve read getting fitted as a high handicapper is not ideal as you tend to change a lot in the swing until you find the right swing, so no I will not get fitted just yet but obviously in the future as I come down to the tens.

Thanks in advance!