The footage itself is about 3 hours long. If you follow along to all of the tutorials and take your time, I'd say plan at least 5-6 hours for the course.
(This does not include the recorded live bonus sessions)
I've been there too! Sometimes you invest in a course but it's not what you had expected. For this reason, I offer a refund if you have watched every section of the course and found that you haven't learned anything new. All I ask of you is to actually watch the course and give it a try, otherwise no questions asked :)
I recommend a Winsor & Newton Designers Gouache Starter Set. (Affiliate Link: https://amzn.to/45ubnF7 ) Any other type of water soluble gouache will also work though! Having a set of acrylic gouache is not necessary, but can be useful if you want to learn that as well. I also recommend watercolor paper with at least 250-300gsm (Affiliate Link for my favorite paper: https://amzn.to/3M1JoG7 ) and I use various sizes of synthetic round brushes.