Data Science and Python is a great combination. Python has been the go-to language for data scientists because of its advent. If you have large data, python handles it better. But if you want visualization and presentation, R is better. Other utilities are somewhat similar. If you are not familiar with programming, R is better than python as it is more readable and understandable for a non-programmer. You can refer to the Intellipaat's online Data Science certification course 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 are a beginner and want to know more about Python and R programming language then do refer the following video tutorials: