Launching multiple products at once spreads your focus too thin. Even established businesses with 25k email subscribers or hundreds of thousands of customers should stick to one product launch at a time. It takes 30 to 90 days to build real awareness and repeat purchases from your existing audience.
Chapters
Theoretically, you could launch multiple products at the same time. I have seen people do it, but I don't think it's a good idea. Even in my businesses that are established that have 15 products and a list of 25,000 people, people who have bought things from us in the past, even businesses that I advise that have hundreds of thousands of customers, I very rarely recommend that they launch more than one product at the same time because I'm yet to see an example of someone doing it well. It takes a good 30 to 90 days to get a product into enough awareness to where you have repeat customers and you have your existing customers coming back and buying the product that you launched.