That good for you for having a time for a week caz they are many of Milan Tourist Attractions and Milan Sightseeing.
For example :
Milan Bus Tours
Milan Walking Tours
Archaeological Museum
Brera Gallery
Church of Sant'Ambrogio
Duomo
Duomo roof
Galleria Vittorio Emanuele II
Meazza (San Siro) Stadium
Palazzo Borromeo
Palazzo Cusani
Palazzo della Ragione
Palazzo Litta
Palazzo Marino
Palazzo Real
Palazzo Sormani Andreani
Teatro alla Scala
Hope one week enough for you, in MILAN
They usually speaking Italian, but i believe they also can speak English.