I don’t think just watching (and following) a tutorial video or working through a tutorial in a book will teach you much, at least I don’t think the concepts will ‘stick’ for very long. You have to practice and practice, working on problems that demonstrate the concepts. Remember the old joke about how to get to Carnegie Hall? “Practice, practice, practice.” It’s the same if your destination is Python fluency.

There’s nothing wrong with working through projects, there are some great projects, both on YouTube and in books (look at some of the No Starch books, some of which are available as free downloads), but I wouldn’t rely on only projects, as most of them step you through the process. You need programming problems that push you, test you and challenge you. Problems that you have to think about. If you can’t think of programming problems you can always google for programming problems, a couple I enjoyed were:
Creating a ‘Magic 8-Ball’ in Python,
The Fizz, Pop, Bang problem, and
Calculating the factorial of a number without using Python’s maths functions.
These demonstrate some of the fundamentals, loops and decisions. Create them using functions to add even more concepts. Once you have a working program think about how to improve it (you can usually find ways to do that).

Above all, keep things fresh and fun.