Oh well, I basically did what you said firstly, so as you said, I don't have to be worried about that path, thanks for clarifying my question.
But If that path doesn't affect the main story, what I have to do now because I don't know what I can do to continue with the main story, I complete most of the sides quest, the part of the hints in the castle(for see a cinematic of the NPC making a kind of strike) and also I help some other NPC, like the slime girl(and Queen Slime) or the old man with backache, with their things for maybe try to continue with the main story, but I think that most of these ones didn't help me a lot.