How do I find myself on the map while canvassing?

You will select your initial location immediately after entering your Conversation Code for the day. 

You can change that location from the turf selection screen. 

Once you have selected a turf, you will be prompted to turn on Live Canvasser View. This feature adds a pin to the map that updates your live geolocation. 

You can also opt to leave Live Canvasser View turned off, and instead manually click Update my Location to change where the marker is on the map. 

For more information, read Start Canvassing with OpenField.