You want to have the small fan oscillating around to move air, not blowing constantly on one plant or you can get a "wind burn". If it's not oscillating, you can aim it on a wall.
I recommend you start thinking about exhaust by now. Once the plants start smelling, the only most practical solution is to get an exhaust fan with a can filter. You have to take the size of your tent into consideration, connect the fan with the filter with a pipe, duct tape it all up, and hang it up in the tent or your place as high as possible, since hot air rises to the top.
Once you have an exhaust fan, if you are using a tent, they usually come with these small intakes that are covered by dryzip flaps. This is what you call a "passive intake". The rule is to have bigger intake than your exhaust, this will create a "negative pressure", which is visible from outside when you turn the vent on, it kinda sucks in the tent walls inside.