Can you please clarify what Islam says about wearing a ring for men on right hand first finger …

There is nothing in the authentic sources to forbid men from wearing of rings on the right hand on any finger. As Imam Nawawi states, “Jurists are unanimous on the permissibility of wearing rings on right or left hands, and that there is no undesirability in it; however, they differ in regards to which one is preferable; many of the pious elders wore rings on the right hand, while others wore on left; Imam Malik preferred to wear the ring on left…” He further adds, “According to the authentic view of our school, it is preferred that one wears the ring on the right, for it is comes under the category of beautifying oneself, and therefore it is more apt to do so on the right hand.”