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 and art critiques from their experiences.
Whether you've done a lot of sketching or are just getting into drawing, you'll find that Matt Rota has many valuable techniques and insights to share. His relaxed and friendly instruction will put you at ease.