It’s only of out focus because there isn’t a large enough depth of field. You will learn to control this as you move through the course but suffice it to say that assuming all else is equal the larger the fstop number the more depth of field.
For example in Landscape Photography you generally want the most depth of field that you can get. That usually means shooting with the highest fstop your setup will allow. Shutter speeds tend to slow down when you do this etc etc but for now just know that the problem with this image is depth of field.
Don’t worry you’re doing fine.
Keep this in mind:
Your first 10,000 photographs are your worst.
-Henri Cartier-Bresson