My troubleshooting would be quite easy:
1) Fuel on MAIN (big lever on the floor, easy to see)
2) Primer locked (big brass Ki-Gas, easy to see)
3) Throttle open (big red lever in the middle, easy to see)
4) Mag switches ON (big shiny switches on the left, easy to see)
Apart from forgetting to change tanks, if my engine stops it's because it's conked out and will not be starting again.......
No carb heat, mixture or electrics to worry about. Single lever operation dating from 1946