Looking for useful courses or certificates

Hello everyone! I am currently studying to get my bachelor’s in chemistry and I am interested in getting a Msc in oceanography. However I don’t think I will make it to this year’s deadline, so I am looking for certificates or seminars to take on this year that would be valued in a CV or just for the sake of knowledge. I am already planning to get a diving certificate this year but I am hoping for some more suggestions from people in the field.