Beat the eggs one at a time, waiting for it to incorporate before adding the next one
Add the vanilla extract and beat until the mixture is homogeneous
While mixing on low (or by hand with a spatula if you were using an electric mixer before) add ⅓ of the flour and ⅓ of the milk, once it's almost incorporated, add another third, repeat until you added all the flour and milk
Pour the batter into the pan
Bake for 30 to 35 minutes depending on the thickness of your cake (dependent on the baking pan you are using), once the cake starts pulling off the edges and a skewer inserted in the middle comes off clean, it is done
Enjoy your boymoder vanilla cake :3
Notes
Do not overbeat the mixture after the flour is added! If you develop the proteins on the flour, you're cake might fall after coming out of the oven
If you used a stand mixer, scrape the bowl often to make sure you don't have unmixed flour or butter, that can ruin the cake!
Measure the flour properly, adding more flour than intended might cause the cake to fall! (See: measuring flour)
Your main flavoring is going to be the vanilla, use a good one!
Be a good boymoder and crack the eggs in a separate bowl so no shells get into your precious cake!