If you want to sail across the wind you can use a paddle to reduce leeway (drifting sideways). Either jam it against the hull on the downwind side or use a hanging draw on the upwind side. You can control your direction by finding the balance point. Moving the paddle slightly forward will make the canoe turn into the wind and moving it back slightly will make it turn downwind.
If you want to sail closer to the wind, let’s say aiming for 45 degrees into the wind, you will make some progress, but it will show up the limitations of using the paddle as a leeboard. Because the windage of you and the canoe is slowing the boat down, the small poling-pole rig will not have enough power to keep you moving at a good speed. This is where using a purpose-made leeboard will make upwind sailing more effective. The leeboard will keep the canoe from slipping sideways as much and also free up your paddle to help you drive the canoe forward. By using forward paddle strokes you will overcome the windage and you will go faster. The sail will give you more power and the combination of the sail and paddle will drive you forward more than either on their own.
You can control the direction of travel by paddling on the upwind side, with sweep strokes pushing you away from the wind and J strokes pulling you closer to the wind.