If the child is in poor health and falls ill at both ends of the day, then I suggest that there is still no need to send him. Take three days off at both ends. If you are often ill, you will ruin your child's health. In addition, if children are too young, they will have a fear of some strange classmates. After all, he has been with his parents for a long time, and now he will feel insecure with many other friends at once. So it seems that the preschool class in the morning is not good for friends, because the thought at this time is not perfect. If the child's physique is ok, then I suggest that he can be sent there to study, at least to learn some rules and so on, so that he can get in touch with the child more and not stay at home all day. And before you go to preschool, you should teach him some rules and so on. Before going to school, you should teach him to urinate and be independent, and it is best to let him sleep alone. Or before attending the baby class, you can try to give him some early education classes to see if he is afraid of his classmates.
I think it is better to send it to kindergarten after the age of three if the economic conditions at home are ok. After all, children over two years old can't fully express their thoughts and wishes. If the teacher doesn't understand your thoughts, then they can't communicate smoothly. If parents don't have time to bring them, they can ask the elderly at home to help them.
Of course, if the family's economic conditions do not allow it, if you decide to send him to a small class, you should also be careful when choosing a kindergarten. The hardware of the kindergarten is not the most important, the most important thing is that the teachers inside must be patient. Parents must do a good job in his logistics to make him feel safe enough.