Italy for 10 days, looking for food tips and other suggestions!

Going to Italy tomorrow, spontaneous trip I adopted from a relative that became ill.
So I am staying 3 nights around “Roma Termini”, at a hostel without breakfast.
Any good breakfast options to check out around there? I know Italy is known for great food, so hoping to not waste my time at touristy restaurants.

How do you find authentic restaurants, I love using google maps, is it reliable in Italy?

I will do a bit of walking. Spanish steps, Piazza Novana, Trevi Fountain etc. Got a reservation for Colosseum and Forum Romanium.

After that heading to Contignano for some relaxation

and then to Firenze/Florence. Want to go to Leonardo da Vinci museum. Otherwise don’t know. Any great restaurants?

Last place is Venice. Walk around and do gondolas? What do you do in Venice?

Total stay is 10 days, 3 days, 2 days, 3 days, 2 days.

Any quick suggestions would be appreciated, otherwise I’m usually good at discovering things while there.

Italy for 10 days, looking for food tips and other suggestions!