One option is to learn on bigquery (a google cloud service) - its "pre-loaded" with all kinds of public datasets that you can just start querying, with a web in

One option is to learn on bigquery (a google cloud service) - its "pre-loaded" with all kinds of public datasets that you can just start querying, with a web interface for doing sql. Its pretty easy to stay within the free tier (1TB of data per month)