"Hello everyone, I'd like to share my daily activities with you. Today, I woke up at 6:00 AM and started my day with a quick workout. Then, I had breakfast and began my online classes. After attending my classes, I worked on my assignments and projects. In the evening, I took a break and watched a movie. Now, I'm looking forward to hearing about your daily activities! What did you do today?"
Feel free to modify it according to your needs!
If you'd like, I can also help you respond to your classmates' posts. Just let me know what you'd like to say!