The data you need for the course can be downloaded from here. Google will probably give you a warning about possible viruses, but that is just because the file is too large to check.
Once you have the data, either start a new project in RStudio or create a new directory for you project from the terminal. Copy the .tgz file into that directory and extract it with
tar -zxvf harp_training_2022_data.tgz
The directory with your new data directory in it should be
your root directory for the course. We will make use of the here
package to read data from directories relative to this root directory.