From time to time I think it's wise to summarize the courses I have on Pluralsight. There is a link on the side you can use to get a free trial if you want to take any of these. Because I redo most of the courses each time a new version of C++ becomes widespread, there are quite a few courses with similar names. Here's a quick summary.

If you are using the latest version of a major compiler, you are on C++20. These courses have been updated for C++20:

• C++ 20: The Big Picture This is an overview covering "what is C++?" and "what is it used for?". If someone has suggested you learn it, start here to understand why you might want to. The title means that it's up to date to C++20, not that it only covers C++20. The actual content is equally applicable to older versions of the language.
  
• C++20 Fundamentals is more properly "the fundamentals of C++ including things that were introduced in C++20". This is an introduction to the ideas, syntax, and standard library. At seven and a half hours it can't cover absolutely every corner of the language, but it does cover what you need to call yourself a C++ programmer, and get started writing real code. This course assumes you already know how to program. If you don't, try Learn to Program with C++ 17 which will cover the building blocks of programming languages like loops, functions, and objects while teaching the C++ syntax and library. Afterwards, you can take Fundamentals to fill in any gaps.
  
• C++20 Algorithms Playbook again covers up to and including C++20, so plenty of things that have been around for decades, but it does have a lot of content that is C++20 only, because ranges made such a big difference here. If you're not on C++20 yet, take the C++17 version, listed below. Both versions are designed to convince you to stop writing raw loops and start using the many useful functions provided in the standard library. I demystify iterators and show you the benefits of using library code instead of rolling your own.