@deusesx Hi, welcome; about FreeCodeCamp I don't know. I mainly came here for the chat channel. Depending on your level of knowledge and interests you can come up with your own research question and work with open data. Data science is not data visualization although it is a way to present your findings. The field is rather large. You can focus on any of the skills. See it this way. If you would have been working with biological data or genome data than you could not show that to an employer in a portfolio. What the employer would rather want to know is: what was the research topic, what kind of problems did you encounter. How did you contribute, solve or use what kind of strategy did you follow. What do you like and what do you do best considered the process pipeline. So your portfolio could be a careful project description with some visualizations. Don't forget about the 'science' in DS; it is a distinct portion of the job. For my own project I keep an official science notebook and log all my doings, missteps, searches, choices etc. I work with primary data, the messiest and dirtiest form as it is the only way to get the secondary data that I can then use for the analysis and testing of my research questions.