I have produced a bunch of short booklets with illustrative games as a ‘starter kit’ to introduce young players to an opening system or defence, like the one on the Colle System.

The other booklets and their accompanying PGN files are not public, but I put together a collection of illustrative games for each booklet, and these are available as Lichess studies, linked below.  Use CTRL_F to find the name you are after: