You have the right motivation but you need to take a different approach.
If you want to help her by making a digital store, you can look into sites like Shopify to help her set up an e-commerce store.
However it looks like you’re trying to set up something with whatsapp. I don’t use Whatsapp for Business so I’m not sure if you can sell products directly from whatsapp but if you’re looking into setting up something like automated replies for customers approaching you on Whatsapp, you can look into this guide I found online.