You can work in pairs or alone.
Otherwise, or if you run into trouble, log into the lab machines. Start Python3 and type "import torch". If this gives an error, try logging into basin -- it should at least work there.
Start the tutorial Deep Learning with PyTorch: A 60 Minute Blitz. Go through the first two chapters ("What is PyTorch?" and "Autograd"). If you want, you can also get started on the 3rd chapter ("Neural Networks").