Actually you can get the Pasmo card (the suica equivalent) at the airport.
The last trip when I landed at Haneda airport, I purchased it just before I boarded the train at the airport.
Very easy.
There will be a staff at the tourism section just after you exit the restricted area. She can speak English and you can ask which way to go to buy the card.
The staff selling the card will ask you how much you wanna top up.
10000 yen would be a reasonable amount if you are going to be there for about 1 week.
Subsequently the card can be easily topped up by cash at any station.
You can select English when you top up.
In the big cities like Tokyo and Osaka, the people can speak some English, so don't worry too much.
You can get by easily even if you don't speak a word of Japanese.