The course best suited for you will depend on how much knowledge about data analytic you already have. My answer will be best suited for beginners and intermediates.
Data Analytics mainly comprises of statistics, machine learning algorithms, visualisation tools and languages like R, python, sas.
For starters, you can learn about algorithms like linear and logistic regression, decision trees, random forests etc and side by side practice them in R or python using a dataset. A good online course for this is Data Analytics by Edureka. The course provides hands on experience of the algorithms in R.
You can also check out the Data Analytics blog of Edureka here:Introduction to Data Analysis.
Hope this is helpful!!