1. I think that constant digital language learning is not a good idea. In my opinion, the main problem is that there is no live communication with people. Also, not everyone has the opportunity and technique of learning online. I believe that a person trying to learn a language online must be assiduous and very patient.
2. I think that cultural differences are very difficult to overcome, especially if there are citizens of different countries in the group. In many countries, the culture of speech is different, which is a significant learning problem. A student may simply not understand the meaning of a statement and not understand the material.
3. I believe that motivation depends on the need for education. If a person really needs education, he will be highly motivated. As for time management, online learning is convenient because you can be anywhere and study. If you really want to learn, then you need to prioritize classes.