This is advice that should be heeded, as even with indulging in the game's tutorials, this is easily one of the most complex strategy games I've ever played, hands down. Right from the start, 'Romance XIII' warns players that they should check out the game's new Hero Mode to understand the game's systems.
The thirteenth mainline entry in the series, perhaps in part due to Koei's recent push into wider Asian markets, makes strides to be at least somewhat accessible, without losing out on any of the franchise's complexities, and at least to some degree, it succeeds on that front. Previous entries have made no attempt to explain their myriad mechanics in the slightest, and generally want players to either be astute scholars of the manuals, or to just figure everything out for themselves.
This is in no small part thanks to the games being nearly impenetrable to all but the biggest strategy diehards. 'Romance of the Three Kingdoms' has been around as a game series for almost 30 years now, and despite Koei Tecmo's best efforts, it still feels like an unknown property just about everywhere outside of Japan.