1) You could start with a good paper and download all its references. Than skim those and download their references.
2) Bulk download all papers (100 TB, 4 weeks, Sci-Hub, preferably in a country where this is legal) and search all those with a local search like Apple Spotlight.
4) Follow Alan Kay, Richard Feynman, Carl Sagan, Stephen J. Gould, The Royal Institution, Stanford EE380, Nasa, Sabrina Hossenfelder, James Mickens and scrape/download their recommendations
5) Start a startup that automates this for everyone. I have written most of the scripts
2) Bulk download all papers (100 TB, 4 weeks, Sci-Hub, preferably in a country where this is legal) and search all those with a local search like Apple Spotlight.
3) Go through HN comments and download its linked papers https://news.ycombinator.com/threads?id=morphle
4) Follow Alan Kay, Richard Feynman, Carl Sagan, Stephen J. Gould, The Royal Institution, Stanford EE380, Nasa, Sabrina Hossenfelder, James Mickens and scrape/download their recommendations
5) Start a startup that automates this for everyone. I have written most of the scripts