The cold water dyes Malka recommends can be ordered online. Other than a good-quality respirator and gloves, many of the other materials can be found in your kitchen, at the supermarket or your nearest thrift store or charity shop.
Whenever you're ready! The lessons are available online any time, and your access to the class never expires.
As long as you need! Your access never expires, so you can come back again and again.
Ask your questions on the platform and you'll receive instructor feedback. Your fellow students are also likely to jump in and offer advice from their experiences.