I'm not able to find some features I need to use in Lightroom, so I'm wondering if it's because I chose "student" instead of "photography professional" during the installation process. Does choosing one or the other options change the interface?
For example I wasn't able to find the option "masks"
Download and install, How to, Presets or profiles, Problem or error
No, the interface remains the same no matter what answer you gave. "Masks" are available when using the various selective tools (brush, radial filter, graduated filter, etc.), press the "O" key when using one of the selective tools to toggle through the mask options.