Sony Vegas Platinum is good editing software. As far as beginners, it has a "show me how" tutorial function. You click on something you want to know how to do, for example import media (videos), and it will flash on the spot that you're supposed to click. It won't let you continue until you get it right.
After you get the camcorder, look up the software programs you are interested in, download the trials and play with them before you buy. It's important to do that, because once you open software, you can't return it.
Sony Vegas trials are fully functional for 30 days; there are also programs made by Adobe, Cyberlink and others.
The Canon HF 506 will come with Pixela software. It's a basic editor, maybe it will be enough for now.