Most of the certification programs online are trained at showing some sort of technical proficiency with a tool, or a base understanding of a method of application like logistic regression. You can check out the following Data Science Courses by Intellipaat.
And if you are more into videos then you can check out this video tutorial which will help you in learning Data Science from the beginning:
And if you are beginner and more into reading blogs then you can check out this blog which will provide you a brief introduction to Data Science.