Thanks so much for the feedback!
Fun fact, I actually wrote it first in english and then I wrote the spanish version because I didn't want to let spanish-speaking folks excluded. But as english isn't my first language, I see how language flaws will be noticeable, but I'm sure it'll get better over time.
As for the feedback about the mechanics of the game, I have to say I'm still fairly new to TTRPGs and this is the first module I've ever written. I mention it not as an excuse, but to express I really appreciate your comments. I do see now all the things you pointed and I will keep them in mind to improve future works and maybe publish a 2.0 version of this one!