I want to buy an Italian restaurant

[Hell Puppy]

Most restaurants fail.

Think about it, how many non-chain restaurants do you know that have been in business for more than say 3-5 years under the same management?

You need a killer location, great food and a very experienced manager to stand a chance.

As others have said, if you're primary motivation is profit, I wouldn't go for it. If you're serious about it, maybe look for an opportunity to buy a stake of an existing restaurant with an option to buy it all later and learn the ropes from the current owner.