To start finding buses, open the app. Then, press the のる (“noru”, get on) button to select the bus stop you will start from. If you know the name of the bus stop, or part of the name, you can enter that as hiragana. Alternatively, press the 現在地 (“genzaichi”, current location) button at the top right of the app to show a map of your current location with all close bus stops marked. Choose the bus stop from the list. Then do the same with the おりる (“oriru”, get off) button for your destination, press the red しらべる (“shiraberu”, search) button to display upcoming buses. The app lists all the coming buses you can use. Be careful, though: buses with orange text at the end of the name have passed already, and buses with red text are running late.
The bus stop nearest to Genki Japanese School is 大名二丁目 (“daimyo nichome”). Don’t get lost!