I must say I am loving the shortcut keys introduced so far! They are quite useful for any kind of work you will be doing in the future.
There is one very basic shortcut Im missing tho, a way to make a region selection, specially in previous lessons where we have to select multiple vertices close to each other. Shift + Click is not the best way to select several vertices might be resting on top of each other, a area selection would do great there. Im honestly desperate to know how to do it, I feel restrained unable to select objects freely in the screen.