To learn what Ian?
Wildlife, studio, lighting, basic camera skills??????????
Not sure you'll find a free course. Some books contain exercises. Have you looked into joining a camera club. There seem to be lots all around the country, many competitive, with a lot of excellent photographers as members. Their experience is invaluable. I joined one in September and have learned so much already. Good luck.
I took a couple of beginner courses at my local college in the evenings. 10x week course, 2 hours a week was £63. Not free, but certainly not expensive. It might be worth looking up your local college.
Hmmm that's an interesting on because product photography is all about lighting, how to light and control light/shade and reflections so not an easy one to find courses for at all, never mind free ones!
What kind of topics did you cover Lester?