There are various data science internship possibilities available. There are numerous start-ups that will provide you excellent exposure and work. You can discover many such opportunities on Linkedin, Glassdoor, Internshala, and many more. To apply for data science internships you should have some necessary skills of a domain like:
Statistics
Programming in Python/R
Databases like: SQL and MongoDB
Good knowledge of methods like regression, decision trees, random forest, etc
The following Data science course provides you a detailed understanding of the project life cycle, data acquisition, analysis, statistical methods, and machine learning: https://intellipaat.com/data-scientist-course-training/
If you want a detailed explanation of Data Science then do check out Intellipaat’s blog which will help you in understanding DS.
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: