If you go to the FAQ section of the learning center, it addressed why your mat spits out. Chances are you are loading it incorrectly. For simplicity of explaining, you should have the bulk of your mat sticking out behind the machine and just the front section of it visible from the front - where you should be setting your origin.
And speaking of origin, I think you will have a much easier time learning if you are sure that you have your machine set to cut from origin rather than WYSIWYG (what you see is what you get). That way it will cut from where you are setting your origin. I would go back and watch that section again.
You might have an easier time learning, if for now, you make your mat the same size as your paper. Then when you have a design on the virtual mat, it will be easier for you to see where it will cut. Try both options so you can understand the difference. The only reason most of us use WYSIWYG is if we are doing something with fold lines or are writing.
Use your test pen instead of the blade and pick some simple objects - and let the machine draw them on your paper so you can get a feel for how the design transfers from the software mat to the SB mat.
Take a deep breath. You will get it. When you are not used to cutting machines, it can be one of the trickiest things to grasp.
Feel free to email me directly if you need more help.
gigica@cox.net We can also set up a tech support call for you if you need that. Let us know.