How did the seven years war affect America? Did it lead to the revolution? Are there primary sources I can read about it?
The question as to the effects on the North American colonies got a pretty good answer here by u/I_Provide_Feedback.
A very good recent secondary source is Fred Anderson's Crucible of War. For primary sources: the diaries of the Marquis de Montcalme have long been used, but they've not been translated from the French:
https://archive.org/details/dumarquismont07montrich/page/n12
His letters have, and now seem to be available from on-demand printers:
In doing a quick search on this I noticed there's also the facsimile of a very interesting little journal of the commander of the 35th Regiment of Foot over at archive.org as well: