Check out Rouxbe Cooking School at rouxbe.com. I took their Professional Plant-Based Certification Course last year, and I just signed up for a dessert course which starts next month. They have courses for home cooks as well as professional cooks. I highly recommend them.
Been searching around for this and this post gave me a great answer, so I thought I would add more to it for others to find as well. https://theculinarycook.com/learning-to-cook-online/ has a good resource for various online cooking courses, both free and paid.