Some practical advice young man ,
Wear a clean logo'ed shirt /t shirt ,be presentable, be clean shaven , neat and tidy hair cut, be polite , etc , etc, ask if they would like to have their windows cleaned, if they say no , give them a flyer and say "in case you change your mind or if you get let down by your current window cleaner "
Set yourself a goal of 100 homes , adapt and learn from your experience, you never know you may be a natural.