double click just solves most problems with clicking, but for tutorial id just say: the main point of the game is to conquer or survive ww1. to do that:
-create army with a forgotten army tab button
-balance civilian & military factory (i think military gives some sort of stuff that you needed in order to expand your army. or to increase the strength of army. the civillian factory, my very untrustworthy memory says its something about the amouny of stuff you can use to work on whatever u can work on that appears in the province option.
diplomacy- if you are a major power (i think its top 5 or 3 on leaderboard)can influence others to bring them into their sphere of influence, basically a puppet state but sounds better. if you are a secondary power you might be going into a sphere yourself.
in a war, just try to shrink your frontline. if it didn't get updated the frontline basically shares army equally as possible. sry if that was long, i forgot a lot of stuff, so do not actually rely on it but it can be a small guide. i think that includes the main points of a tutorial if there is one