Problems installing Debian

[M.R.P. zensky]

 Hello I have successfully installed ubuntu linux on my system but I want to 
use Debian. I download the iso file from their home page. One problem that I am 
having is the Debian install menu asks for if I use a network card. I don’t I 
use home based wifi which I don’t see an option for this. The other problem is 
that it asks for a proxy for adding a repository.  I don’t know what to do with 
this either. How do you connect Debian to my home wifi?