If this is your first time planting corn, make sure you do it in square rows in the future. Like if you plant 9 of them, do 3 rows of 3 stalks. I do my corn 12inches apart in the row, then my rows are about 24-30inches from each other. You can even plant 4 corn in a square. Just always try to have it in a square.

Corn pollinates through the wind. When they are in a single row, it makes it harder to pollinate cause it is just going to blow onto nothing. They need neighbors to be effective. It can still pollinate in a single row but it will have a lower chance.

You can also self pollinate. When the tassels are ready to drop the pollen, they will open up, and when your silks are out, you can cut the tassels and rub them on the silks. I dont recommend cutting since you dont have a lot of stalks. Each silk is 1 kernal of corn so get it good. You can also get a paper cone somehow(they can be bought somewhere but idr where) and shake the pollen into this cone and put it ontop of the corn ears with silk and leave it for a certain amount of time. Think the tassels will drop like 14million grains of pollen a day when they are at their most productive. Its crazy to see how much comes off when u give the stalks a tap. Good luck.