My little baby is currently in a large class, and his pinyin phonics is not a problem, so I will share my experience with you, and there are also small suggestions, to see if it can help you.
When my little baby was in the big class, he began to give him pinyin enlightenment. First of all, look for pinyin on the Internet**, this stage is to let him have a concept of 26 letters and syllables, and basically arrange 5 to 10 minutes a day.
After looking for a picture book with pinyin that he is interested in to read to him, the "rainbow fart" of parents at this stage is very important, and those with babies understand this power.
At the beginning, the content was controlled in one line, and slowly increased, and my family was a week, and a line was added every week. I don't want to add it to the fifth line, well, I'm up to him. After insisting on it for a period of time, let him read the first grade supporting extracurricular reading, one page a day, with an accuracy rate of 98%.
There may be some parents who say that their Mandarin is not standard, and they are afraid of taking their babies astray, so they dare not teach them themselves. But I want to say that you act boldly, firstly, you are stronger than the baby in this knowledge point, and you are our mother tongue, so you will not be far behind.
The second is that even if you teach it wrong, the teacher will still teach it in the first grade.
The third is to learn not standardly, and he will correct it himself when he finds it in the baby's later life. Like myself, I used to pronounce "Beijing" as "bái jīng" and "temporarily" as "zán shí", but I haven't corrected it yet.
Fourth, even if you find an institution to study for a month, you still have to follow up when you come back, or you can't engrave it in the baby's mind (from my old university pinyin experience); So it's better to save the training fee directly.
Some people say that the primary one will teach, and there is no need to learn early; That's right, it's going to teach, but the progress is fast, the baby generally can't keep up, can't eat thoroughly, and I personally recommend learning early.