What is Reddit's opinion of Introductory R: A Beginner's Guide to Data Visualisation, Statistical Analysis and Programming in R?

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This has a strong biology focus and is written for the beginner https://www.amazon.com/Introductory-Beginners-Visualisation-Statistical-Programming-ebook/dp/B00BU34QTM/ref=mp_s_a_1_1?dchild=1&keywords=introductory+r+knell&qid=1604345682&sr=8-1

That's fine. Books include both ebooks and physical books. While some would argue the pros and cons of each, it's not really important for learning. I'm not sure about any free ones, but here's a very affordable ebook that is well recommended.

I'm nearing the end of the Google certificate, and if you've already done some SQL and Tableau I don't think it's going to add a lot for you. The courses include a lot of talk about soft skills, congratulating you for making progress, and advice about job search things like working up your LinkedIn profile. It's kind of fluff, but could really be helpful if you feel like you need coaching in that area. I think you're probably going to get more mileage out of small specialized courses.

Also, I see from the comments that your degrees are in biology and physical therapy. As someone with a degree in religious studies, I'm sorry, those are not "unrelated" degrees.

I did a class last winter that used Python, and just completed the Google Certificate course on R. It mostly uses R as a fancy graphing application, and doesn't get into programming/computer science at all. Having experienced a bit of both, I somewhat prefer R for data analysis. In addition to the Google course I'm reading this book, which I enjoyed despite some of it going completely over my head, but with your background it should be perfect: https://www.amazon.com/gp/product/B00BU34QTM/ref=kinw_myk_ro_title