First thing is that data science is a broad field. There are several job roles related to data science like data analyst, business analyst, big data engineer, data architect, Machine Learning engineer and many more. So, you need to be aware of all the job roles(if not all at least a few) and should be sure about which roles interests you and suit you.
The next thing is you need to have certain skills before entering this field. You need to have a balance of both communicative skills and technical skills. They are as follows:
Linear Algebra and Calculus
If you are a beginner and want to know about the use of Data Science with Python then do refer the following video tutorial:
You can also check this immersive video tutorial on R programming for more insight:
You can get a hands-on project by referring to the following Data Science certification which will teach you Data Science from scratch to advance.
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 Data Science tutorial which will help you in understanding Data Science.