If you are interested in rock art, you may be interested in this online course that I am conducting at SEAMEO SPAFA (my day job) entitled Rock Art of Southeast Asia and the World. This self-paced online course introduces you to the rock art of different parts of the world, covering all the continents but also having a specific focus on Southeast Asia. Speaking as the course convener, it is a one-of-a-kind course since the lectures are conducted by experts from the respective regions, and there is other types of content like virtual site visits and supplementary reading material as well.
You can read more about the course and register here. It starts on May 2 and runs through May and June.