Don’t have Photoshop? Try GIMP (GNU Image Manipulation Program).
Don’t have Illustrator? Try Inkscape.
Don’t have InDesign? Try Scribus.
None of these will work exactly like their Adobe counterparts, and all have some bugs and frustrations, but they should all work on a multitude of platforms and cost you no money to download and use. There are also big online forums to support your questions for each of these (they are all popular programs).
The downside of using these programs at home during the course is that the demonstrations we do in class might not map onto them as easily as with the Adobe Suite, but they are worth familiarizing yourself with to make that judgment yourself.