Tomori says he is eager to impress in the Serie A after making a permanent move to the San Siro.
The 23-year-old came through the ranks at Chelsea after a successful loan spell at Derby County in the 2018/2019 season.
He became a regular starter at some point at Chelsea during Frank Lampard's first season in charge as head coach.
His stellar performances were rewarded with a new five-year deal and was called by Gareth Southgate to represent England.
Tomori found games hard to come by in the second half of the 2019/2020 season and his plight at Stamford Bridge continued in the 2020/2021 season.
He joined AC Milan on loan in January in search for regular football and he made his switch permanent after the Rossoneri triggered a clause in the Englishman’s deal.
On being a big-money signing for the Milanese-club, Tomori told Corriere delle Sera: "No pressure, it’s actually satisfying to feel trust around me, everybody is helping me, this is the right project for me.
"Everybody welcomed me all very well, from the first day. This is a great club, with exceptional training facilities. There is everything to grow and to win, it’s a dream.
"Nothing is impossible, we play to win. We have a young team and we are improving. Last season we finished second and it means we are on the right path. We need to continue like this, step by step."