Drawing a Tree
A fun way to design a landscape is in elevation - or a straight-on view as if you were standing and looking at it (vs. a plan view that is looking down from the sky). When designing in elevation take note of how all plants have a unique form. Some are circular, oval, columnar, pyramidal, weeping or even irregular. You can read more about plant forms here.
Take a photo of your house, lay tracing paper over it, then try drawing a composition of different plant forms in front of it. Think about accentuating your entry, while also framing your house overall. Mix different forms, plus layer them (2-3 rows of plants is much more interesting than one).
Below is a simple tutorial of how to draw a tree. Practice drawing a variety of plant forms. No need for perfection, simply enjoy the process!