There is a saying that the grinder is more important than the machine.
To start I would get some fresh locally roasted beans from a cafe near you, instead if using old store coffee beans.
Then if your grinder can be adjusted grind the beans finer and go again.
You should also have two sets of baskets for your portafilter, if the above is not helping try using the pressurised baskets. It's the one with one hole at the bottom.
If still no luck and for really great results, you may want to upgrade to the matching sunbeam conical burr grinder which will work great with your shiny new machine.
For now worst case I think the pressurised baskets will get you off to a start though