Which local organizations can help free of charge? E.g. Business clubs, business advisory organizations etc?

You can seek advice from the associations supporting your fellow countrymen and women, and from the entrepreneurs offices. 

More information
There are several association aimed to integration of refugees and immigrants, often especially dedicated to specific nationals. You can find a database here: http://www.integrazionemigranti.gov.it/Areetematiche/PaesiComunitari-e-associazioniMigranti/Pagine/mappatura-associazioni.aspx
Chambers of Commerce can also provide legal and practical advice: 



The local SUAP office.