Quarto reveal.js presentations are readily themeable and highly customizable. I wanted to use the accessible Aktinson Hyperlegible font, which took me into the world of *.scss files. It turned out almost trivial: a few lines to overrule the font of the themes, and a tiny change in the YAML header.
Quarto comes with several HTML themes built in. They are documented, but coming from the Bootswatch project, the existing documentation doesn’t give a good impression of what each theme looks like when used for an article.
Looking to get started with data science, but scared it’d be too complicated? There’s a new book by Elena Llaudet and Kosuke Imai that will get you covered. Data Analysis for Social Science: A Friendly and Practical Introduction is now available as an e-book, and it truly delivers what the title claims: friendly and practical. It’s also up-to-date, with a focus on experimental data and causal inference much more than on multiple regression analysis. I don’t think I’ve seen a more accessible introduction to R and Rstudio — cheat-sheets included!