Where could I find a Homestay family in the Shinjuku area?

I apologise if this is the wrong place to ask this.

In February, I'll be going to Tokyo to study at a Japanese language school for 20 weeks. Usually, the school I'll be attending organises accommodation, but since I booked on short notice, they said that finding something this quickly would be unlikely.

The school is located in the very center of Shinjuku, so something in that area would be nice, but places that are bit further away are also OK.

I would prefer a family with children so I can practice my Japanese with them if that's possible.

I am 17 years old and male if that helps.

Thank you so much for your advice! 🙂