Founded in 2010, Udemy is an online learning platform that can be used as a way to improve or learn job skills. While there are courses you have to pay for, there are plenty of free programming courses, which are taught via video lessons, such as Programming for Entrepreneurs -- teaching Django- the #1 Python Frameworks, APIs, HTML, CSS, + Payments.
As a self-taught programmer, you might also benefit from books that offer broader advice on the profession. You’ll improve your thinking and habits, traits you can apply to any language you decide to learn. Steve McConnell’s 900-page Code Complete: A Practical Handbook of Software Construction (2nd Edition) is considered the definitive guide for best practices, with data-backed advice on everything from project design to debugging code.