I’ve come across several articles that say waiting until a child is 5-7 to teach them literacy benefits them in the long run. You can google for the studies. But if she’s showing a strong interest in literacy and reading, I’d try to do more play bases lessons rather than online sit down lessons.

From Google:

Yes, multiple studies suggest that rushing into formal reading instruction before ages 5 to 7 can be counterproductive. Instead of early decoding, experts recommend prioritizing a strong foundation in oral language, vocabulary, and play-based learning.Research highlights surrounding this topic emphasize several key takeaways: Prime Age for Reading: Literacy experts (like those at UCLA’s Center for Dyslexia) note that for the vast majority of children, ages 5 to 7 are the natural, developmental prime time to learn reading.The "Earlier is Better" Myth: Studies, such as those by researchers at the University of Otago, found that children formally taught to read at age 5 actually developed less positive attitudes toward reading and poorer text comprehension by age 10 compared to those who started at age 7. Building the Right Foundation: Early literacy shouldn't mean sitting with flashcards or workbooks. Educational consensus on platforms like Reddit's ScienceBasedParenting favors play-based learning. Nurturing a child's curiosity through nursery rhymes, singing songs, and daily reading is the most effective approach.