How do you tell the direction of spin? Simple - look along the nose - NOT towards the ground - which means sighting up through the canopy and can be deceptive. When you are looking along the nose, the nose will move towards the direction of too much rudder. So, Power off; Controls to Neutral (stick and rudder); Check the direction of rotation / apply rudder in opposite direction to spin rotation; when spin stops and airspeed is above stall speed, apply power & recover to straight & level.
Basic approach works whether upright or inverted, flat or other.