Hi,
There’s several options to use fastai and follow the courses. The easiest are using cloud platforms, like for example crestle.ai or colab.
If you want to use your local machine it can be harder and more frustrating. I think the guide you’ve linked to is obsolete, please follow this one instead.
Please try to persevere, fast.ai is worth it. Many other students managed to set up their environement to follow the fast.ai courses, there’s no reason you can’t do it !