You should be good at Mathematics. But, that is not an issue because it will just take some time to learn Mathematics especially Statistics for Data Science.
Data Science without Statistics is like a car without steering.
After that, you should start learning R or Python for Data Science.
You must start with this comprehensive Data Science tutorial.
This will give you a complete insight and learning path for Data Science.
Now, if you want to learn by implementing the skills then you can go through this Data Science video tutorial:
Last thing, Certification acts as a hallmark for your skills, so, you must go for Data Scientist because it is a Live Instructor-Led training with real-time industry-oriented project: