Hi EricLNZ I downloaded of of the internet as I thought I wasn't getting the full program. I also have a disc. I am very un pleased with this product as it is nothing like Windows Live Movie Maker which is unavailable for windows 10. I guess I just do not understand the program. I have been through tutorials including 2 on you tube.
I gather that you have now downloaded, installed and registered the program. You could start in "Simple Edit Mode" (see that option in the upper left corner of the window) and go through some basic tips there (in green boxes, click "?" upper right if you don't see them). The "Show Me How" button reveals some short basic tutorials for you to inspect. But @Dr Zen has an excellent tutorial here https://www.moviestudiozen.com/free-tutorials/sony-movie-studio-platinum/521-beginners-guide-movie-studio-platinum-13. Go through it if you haven't yet, it's worth it. The learning curve is not too bad even if it may see somewhat daunting at first.