you can learn the mechanical by taking a class or reading books and manuals. but we've found the best way to learn is to just use the NLE. don't be daunted by the insane interface and the thousands of keyboard commands. eventually it won't look like it makes sense. and don't try to learn all the command keys all at once. instead learn them over time so you will pick up things that work for you. here's four keys you need to know to start things off: ABMN. A is the pointer, B is the Razor, M adds a marker, N is turns Snapping on and off.
dropping an image onto a page will more often then not place the graphic in the middle of a white or black box. this usually doesn't help you as you want it to merge into the background so text or other objects can flow around it's edges. this could be for your logo, an object, text or photograph where you just want the object and nothing else. fortunately, there are lots of ways to add transparency to any image.