I just wanted to first say that you have done an awesome job with the course. I recently stumbled upon it and it has been of great use in my Vietnamese studies. I have found some errors in the course, most relating to the English translations/word choices. I would be willing to help correct these mistakes and also help you with the course in whatever way I can if you’d like. Otherwise, I can PM you a list of errors as I come across them.
Also, if you are looking for inspiration for material to add to the course, I’ve been creating my own list of words and grammar which you can free free to pull from. I just published it recently. Most of the words and grammar points are what I would consider intermediate to advanced level. It’s not formatted well but you can take a look if you want.
Here’s the link: https://www.memrise.com/course/1340372/vietnamese-vocabulary-8/
Finally, anyone seriously interested in Vietnamese learning and looking to chat with someone who’s also serious about Vietnamese and other languages (specifically Asian ones), hit me up.
Again, awesome job on the course so far Eriinnye. You’re making life a lot easier for Vietnamese learners like myself.