Thanks everyone, the comments are much appreciated. Here's a list of books and other media resources recommended so far in the thread:

Robert C. Martin, Clean code: https://www.amazon.com/Clean-Code-Handbook-Software-Craftsma...

Vaughn Vernon, various: https://vaughnvernon.co/?page_id=168

Steve McConnell, Code Complete: https://www.amazon.com/Code-Complete-Practical-Handbook-Cons... 2

Clean coder: https://cleancoders.com/ videos

Hunt and Thomas, The Pragmatic Programmer: https://www.amazon.com/Pragmatic-Programmer-Journeyman-Maste...

Hitchhiker's Guide to Python: https://docs.python-guide.org/

Dustin Boswell The Art of Readable Code: https://www.amazon.com/Art-Readable-Code-Practical-Technique...

John Ousterhout, A Philosophy of Software Design: https://www.amazon.com/Philosophy-Software-Design-John-Ouste... This one looks particularly interesting, thanks AlexCoventry!

Kent Beck, Test Driven Development: https://www.amazon.com/Test-Driven-Development-Kent-Beck/dp/...

Dan Bader, Python Tricks: The Book: https://dbader.org/

Ian Sommerville, Software Engineering: https://www.amazon.com/Software-Engineering-10th-Ian-Sommerv...

Svilen Dobrev, various: http://www.svilendobrev.com/rabota/