It’s normal until you internalize the grammar structures and start to get a ‘feel’ for the meaning of sentences. When I was at the stage you’re at now I did a lot of googling of individual grammar points to try to glue together the meaning of the sentence.
That book has a club actively going, I think? See here: Home Thread for また、同じ夢を見ていた / 또다시 같은 꿈을 꾸었어 (노블판) 📖 🇯🇵 🇰🇷
If you call out which chapter you’re in and spoiler the contents asking for help understanding I think people would be happy to assist 
