There are several good MOOT options to learn for fast-paced students, but I believe that personal physical mode of training still has a long time to be deemed obsolete. It is still the most effective way to learn.
There are many online courses where you can get certifications for Big Data and Data Science. You can refer to Intellipaat's online Data Science certification as it will help you in preparing for a career as a Data Scientist and highlights concepts and tools you will need during the entire data science pipeline, from asking the right kinds of questions to making conclusions and publishing results. It will also help you in developing a portfolio of projects that you can showcase during interviews. And if you are more into videos then do check out the following video tutorial which will help you in mastering in the field of Data Science:
If you want a detailed explanation of Data Science then do check out Intellipaat’s blog which will help you in understanding DS.