from my POV the project sounds very interesting.
I will start, for sure, to use your platform for boosting my English!
At the same time looks quite weird what you wrote about user behaviour.
In my experience building communities, I learned that, very often, it does not matter how good is the platform in terms of features. It is very important how the users are engaged with it and how the user generated content is handled.
Anyway, due to the fact that I did not had direct experience with your platform I will ask some questions:
- are the main user tasks well explained in terms of call to actions, placeholders, labels and step descriptions (if there are any of them)?
- is it available a tutorial or a demo to help users understanding the main task?
- how you reach your audience?
*There is any subscription form?
*Are they invited to join the platform?
- Is it available any power users giving help and tips how to manage the platform features?
Don't give up and embrace the challenge, I'm sure you will reach your goals