This game is absolutely amazing! Although I think I should skip the post since I've never really finished the game! I have a track record for that! For not finishing games I actually like! I did the same with FarCry!
Although this I need to get back onto!!!
You could always watch a "cinematic movie" compilation video on youtube. The gameplay itself might have a little dialogue but mostly it won't impact your ability to understand the story. Just try to find one that doesn't cut out the major conversations within the stages and you're golden. That is of course unless you want to experience the story first hand. But if your track record isn't to finish games even when you like them it's always an option. I'm like that too. I think so far the only games I've ever been religious about finishing are Genshin right now and Pokemon back when I was a kid haha
If you like strategy and a very good story I recommend it 100% you will not waste your time :)