Thanks again; another update has been uploaded ;-)
Please let me know if anything else useful can be learned for contributing.

Just submitted the adjustments suggested; hte tool automatically suggested me to 'upgrade' the provided (amenity=) tagging (to osm.wiki/Tag:education=)

Hi Sammyhawkrad and thanks for your feedback ;-)
I will add the indicated amenity=school tag as it is indeed a school. Also will I adjust (to) the mentioned title case values. Besides, the address provided is correct (corresponding the written correspondence of the school director I received) but relates to a PO box instead of the physical school building.