You can posts passages here. Although 400 words is a bit on the long side, someone may still take a look. We are all volunteers, so sometimes someone will read it thoroughly and offer good advice... and sometimes articles stay without a single response. Maybe because it was too long, full of too many mistakes, or simply not interesting to the person reading it.
This might be a good time to learn an expression about what happens when you get free advice: You get what you pay for.
So post your passages and see if you can get someone to take a look. (You may want to start with a shorter passage.)
Student or Learner