Thanks for the warning, Suzi. Congratulations on your new saw. It will do a great job on plywood and should get thru a 2x4 if you are cutting across it the long way. It will not do a good job on crown molding. You need a totally different type of saw for that. If you are going to cut a lot of plywood that you want to have a really smooth edge (like you are building cabinets), you might want another carbide blade with more teeth but the one you have will work great for 90% of what you will probably be doing.
I suggest that you get an issue or 2 of The Family Handyman magazine. It is a great resource for home repair and remodeling directions and ideas. It will also show you ways to use your saw for making cuts safely and hints for making cuts in unusual situations. Of course, it has a lot more than just using a saw but it is a great resource. You can find it on any large magazine rack.
The number on rule though is to "read, UNDERSTAND,and follow all the safety rules that come with your power tools. And the most important rule is don't forget to wear these, safety glasses." Darn, I forgot who said that. Safety glasses are available at any hardware store or home center and more stylish ones are available at industrial tool supply stores.