1. Find an image that you want to use that is a square or close to one.
2. Take that image and use http://www.simpleimageresizer.com/upload#.XSKLQuhKiUk , click on dimensions, then do 512x512 and resize it.
3. Download the picture and open up paint.net (download at https://www.getpaint.net/)
4. Open the template I provided which you can download here --> https://cdn.discordapp.com/attachments/581279758864613379/597586525403742210/template.png
5. In paint.net, go to layers, than Import from File, and find the 512x512 picture that you have.
6. Then with that picture, drag it over to the blue so it completely covers it.
7. Click save as and then rename it, along with changing the format from pdn to png.
8. Make an education.minecraft.net account with a Microsoft/Xbox Live account.
9. Find a random lesson at https://education.minecraft.net/class-resources/lessons/ and go to the notes section, where you will choose the image you dragged the picture over the blue on.
10. Click save, go back to the notes, right click over the image and click on open image in new tab.
11. Replace the insert url into where it says, and then copy that. {"textures":{"SKIN":{"url":"INSERT THE EDUCATION MINECRAFT URL YOU WANT TO USE"}}}
12. Go to https://www.base64encode.org/ , copy the code that you just made, and press the encode button. This will come up with a bunch of characters, because you encoded it into base64.
13. Replace that encrypted code you just got with the one in this(starts with ey):
/give @p player_head{SkullOwner:{Id:"314d6164-6520-6279-2052-756e61696963",Name:"{INSERT NAME}",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHBzOi8vZWR1Y2F0aW9uLm1pbmVjcmFmdC5uZXQvd3AtY29udGVudC91cGxvYWRzL3ByaXZhY3lpbnZhZGVyLnBuZyJ9fX0="}]}}}
14. Replace the name with what you want it to be, and then copy that command onto your clipboard.
15. Go into a singleplayer/multiplayer game, get a command block, paste that command in, and then use a button to activate it. This will get you the head with the picture on it.

You're done!