I am going from Narita to Shinjuku at about 11:30 am next Thursday. I thought of Narita Express, but it seems like the Keisei Skyliner to Nipporo, and Yamanoto line to Shinjuku is both faster and more frequent (it seems to be the same when I will go back to Narita - early in the morning a week-day). Is Nipporo a big station? Any problem finding the right line when changigng trains at Nipporo, if I choose the Keisei Skyliner instead of the Narita Express?