Hi @Giacomo Raucci ,
Go to SQL Server Configuration Manager. Have you checked the properties? If it's gray, it should be Disabled for the properties setting of Start Mode, and you need to change it.
You can change it to Manual or Automatic. Then you can start it.
Best regards,
Seeya
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".