Do you have good eye to hand coordination ??
If not, take some drawing and composition classes. Learn the basic elements of design.
If you do... take some more classes and learn the intermediate stages of basic drawing.
There's nothing better than having basic drawing skills and the concept of putting things together so they make sense to the rest of the world.
Draw your house and when you're finished, go outside and see how closely it resembles your drawing. Add the things you forgot and this will teach you to look more closely at things you want to draw and to pay closer attention to your surroundings. Perspective is the next natural step and then shading. Practice one hour a day and you'll be amazed at how much your
computer skills will develop.
In another lesson..... draw whatever you feel like doing and this will further your creativity or what many call.... 'thinking outside the box'.
Good Luck..............