I’d love to teach that course for half that cost…
In addition to the aforementioned resources many design schools have short how-to handouts available online – might be helpful to browse around through those as well. Key to learning software is to have a project goal in mind and see how it operates and helps you get there. InDesign will help a lot with presentation layouts, Illustrator can produce great line graphics and diagrams (It takes AutoCAD output to another level of clarity), Photoshop is good with photos and similar graphics. Get to know folks in school and around you that know the software well – they can be immensely helpful with shortcuts and strategies.