Here are my favorite free online studying materials and career prep tools for newbies building a data science career in 2021(including myself).

Statistics

• Think Stats 2e - Book
• Think Bayes - Book
• Introduction to Biostatistics offered by The Johns Hopkins University - Lectures
  
  

Python + Machine Learning

• Think Python 2e - Book
• Python Data Science Handbook - Book
• TensorFlow, Keras and deep learning, without a PhD - Book

In youtube, there are countless channels dedicated to the topic. My frequently visited sites are:

• 3Blue1Brown - Cool visualization helps. Neural network series is my favorite.
• freeCodeCamp
• Data Umbrella
• PyData’s local community meetups
  
  

Open data sources

• Kaggle
• DRIVENDATA - Kaggle-like website providing data for social good
• TidyTuesday - Open datasets provided by R community
• The Humanitarian Data Exchange - Humanitarian database provided by OCHA
  
  

Career advice

• Build a Career in Data Science Podcast - Podcast
• Data science is different now - Blog post
• Advancing Your Data Science Career During the Pandemic - Video
• @BecomingDataSci on twitter and her collection of DS learning materials
• Data Helpers - A list of data professionals who are willing to help newcomers
  
  

CV / Résumé

• Overleaf - Great for CV and cover letter; Easy of use & free templates available
• GitHub Pages - To build a personalized website for portfolio