I have been looking at some of the Udemy courses that are available for free using various codes. Below are a number of courses across tech, photography, generic and business. At the time of posting all codes work as have checked them. Some of the courses are already on here and some are not, so credit to any of the regular Udemy posters (paticularly @matwalaboy , @VFX9 and @Raspberry ). Hopefully you will find something that maybe of interest to you.