Usefull information about entry visa, residence permit for study anf health insurance can be found at the following links
ENTRY VISA:
http://www.poliziadistato.it/articolo/view/10620/
http://vistoperitalia.esteri.it/home/en
RESIDENCE PERMIT FOR STUDY:
https://www.yesmilano.it/en/articles/how-convert-residence-permit-study-work
https://www.portaleimmigrazione.it/
HEALTH INSURANCE:
by Scuola di dottorato, last updated on 01/09/2021