you can apply to get a diploma after courses but it's not free (https://onlinelearning.hms.harvard.edu/hmx/hmx-pro/genetic-testing/?utm_source=google&utm_medium=cpc&utm_campaign=NextGenSequencing&utm_term=ngs%20online%20course&utm_content=481988406888&gad=1&gclid=CjwKCAjwvrOpBhBdEiwAR58-3AzJUeAvs_KWyAW-HCJwOCjsmw3tIsmsIjk5ZpogYtRRmJL-XX_1nRoCQp4QAvD_BwE), but there are some other good planning, or by your own in professional enterprises as illumina (https://emea.illumina.com/products/by-type/service-products/intro-to-ngs-training-courses.html).