If patience (or yeast) is in short supply, you can also buy starter from reputable online sources like King Arthur Bread, a website I recommend in general for its gentle tone and flour expertise.
If patience (or yeast) is in short supply, you can also buy starter from reputable online sources like King Arthur Bread, a website I recommend in general for its gentle tone and flour expertise. If you have a local bakery, you could also ask them to sell you a bit. Plenty of sellers on Etsy offer sourdough starter, too. There's even advice for making a gluten-free starter, if you love bread but your body hates gluten.