Can you ask some professor of your university to give some feedback? Go to their office hour, bring your printed manuscript and explain what you explained to us.
Con: They might be less expert in the topic of your work.
Pro: They know the standards of your fields and how to write a scientific paper. Further, they might help you directing to the next step, like starting a real collaboration with someone, improvingpartsimproving parts of the paper, or submitting directly to a journal.
Pro: They might me more inclined to help a master student of their own faculty compared to the other professor who would be helping an anonymous student from another country.
Pro: You get direct feedback, you don't have to wait for weekweeks without knowing whether you will get an answer at all.