Boules Lessons?

I learned in 15 minutes by just watching and joining in on a game. Not difficult. Sorry, it was more than a few years ago and I do not remember the rules.

The rules may be easily found online (it's not a complicated game) and, as suggested above, a few minutes of watching others play (either in an online video or in person) and having the rules handy should be plenty of preparation.

Best thing is ask some guys at a local bar or walk to some guys playing, perhaps offer some water or pastis :)

For advance study, our local petanque club suggests these notes: https://petanquerules.wordpress.com/rules-summaries/.