There isn't much I can do to help you out on that one beyond buying some more disk space. I use a 1tb computer that I built with my own two hands, and even then, I now have several 2tb Seagate drives and an external 1tb Samsung drive. Not to mention the zillions of 128gb Lexar USB flash drives I have floating around my house.
Film editing, in my experience, takes up a lot of storage. Especially during the export stage when the file ends up being hundreds of gigabytes in size (That's the power of GoPro Cineform).
My best advice to try and save space would be to make a light color grading adjustment instead, and limit things down to the basic features (like saturation, contrast, offset, midtones, shadows, etc.). Stay away from a lot of the GPU-heavy features in your software (In my case, this would pretty much mean anything related to Fusion or the FX features in Resolve), because those will most certainly guarantee the need for more storage space.
Either that or save up and buy yourself an external drive, then get in the habit of storing things in it.