If you drew an object, gave it a nice color, you still need to move it to it’s place, scale or rotate it. This is what the “Transform tool” is used to.
So select the transform tool from the toolbar, and …
…to select : Click on the object (select multiple objects by holding down Shift - more about this in a later post)
…to move: Select the object by clicking into it, and hold down the left mouse button to move it around. Holding down Ctrl the same time limits the movement horizontally or vertically - this is great for aligning objects.
…to Scale: Click once to the object. You will see the small transform arrows appearing. Click on an arrow to scale the object at the given dimension. Holding down Ctrl the same time lets you scale proportionately.
…to rotate: Click twice on the object. You will see that the transforming arrows around the object are changing. Click and hold an arrow at the corner of the selection to rotate the object. Notice the cross at the center of the selection! That cross is the center of the rotation. Put it elsewhere to rotate ie. around a corner etc. You can put it even outside the object boundaries.
… to skew: Click twice on the object. You will see that the transforming arrows around the object are changing. Click and hold an arrow at the sides of the selection to skew the object.

Tip: by pressing the Space button you can switch fast between the current tool you use and the Transform tool. Press it again to switch it back! Good luck!