Here are three useful resources for learning about Data Science:

• Machine Learning and Deep Learning Tutorial List: This link contains a topic-wise curated list of Machine Learning and Deep Learning tutorials, codes, articles and other resources

• Data Science Tutorials for Python: This link contains a curated list of Python tutorials for Data Science, NLP and Machine Learning. This also serves as a reference guide for several common data analysis tasks.

• Data Science Tutorials for R: This link contains a curated list of R tutorials for Data Science, NLP and Machine Learning. Also has code for several data analysis tasks in R such as Text Mining, Time Series Analysis and Topic Modeling.