Giovanna's place is beautiful, it's a short walk from Central station and a main shopping street that will lead you all the way into the centre of city if you feel like an amble. It took me about 30 mins I think and you can capture a few sights on the way into town. There are restaurants nearby and takeaways if you feel like having a lazy night in after a long day in the city.
Otherwise there are several metro stops in easy reach to move around Milano with ease. I'd happily stay here again on my next visit to Milan