With a basic necktie, you want it to be at your waist when you are done tying it. See what best fits with your height.
Place the wide end of the tie on your left and narrow side on your right.
Cross the wider end over by putting it around the back side and around again.
Then you’ll put the end up through the neck, once you put it up through the neck, then you’ll want to make sure it’s flat around your neck.
Then you’ll shove or poke the end through the knot.
One side will tighten the knot, you don’t want it too tight! The other side will be the adjustment for the neck. Bonus: place a dimple right below the neck. You don’t want the back of tie longer than the front, unless you are wearing a vest then it doesn’t matter.
Once you are done, make sure the tie is covering the first button of the shirt.