Hi, don't worry. In these 2 years kids are already well aware of the virus so just give them proper mask, sanitizers and give them instructions. Also, it may take some time to get used to the offline classes. And that's okay.

Hey mom , dont be worried things will go well. Its their first day so once they are back from school open them with an open arm, ask them how they feel . How was their day and also help them to settle them with a rotuine probably you look forward for. This help me to do with my kids so it was helpful. You can try this and let me know how it has helped you.