I just started learing C++

Try this: Learn C++[^]

When I learned programming, there were no C++ compilers, because the language wasn't fully defined yet. We had precompilers for translating C++ into C, and these changed every couple of weeks, due to changes in the language definition. I learned structured programming with Pascal, then bare bones stuff with Assembler, then functional programming with LISP.

Only then did I start learning C because I needed it for a project, and then C++ for another project. Basically the books from Kernighan & Ritchie (for C) and Bjarne Stroustrup (for C++) were my main source for learning, but I could immediately practice my new-learned skills in an actual project.

I think this is the key: having a good reference to the language you want to learn, and a good project that you can use to practice your new-learned skills. In that regard, the book "The C++ Programming Language" by Bjarne Stroustrup is a very good point to start, as it's structured very well, and does contain many code examples that you can try for yourself, or extend a bit to get the hang of it. It would be even better though, if you can find an online tutorial with exercises of increasing difficulty: you can only really learn by practicing.

If this is your first programming language, I strongly advise to start with C though: it is much simpler, and learning it gives you a much better idea about programming in general, and how computers really work. "The C Programming Language" by Kernighan & Ritchie is a good place to start, but, again, finding a good online tutorial is crucial to really learn C programming.

Me? A four year Uni course, mixed with periods in industry.

Books help - they aren't as good as courses because if you don't understand something your teacher says, you can tell them and they can rephrase it until you do. Books can't do that.
But they are orders of magnitude better than YouTube videos, most of which are made by people, who have no idea how to make a video, and little more knowledge of the subject than the people who are watching. Avoid.
The other way - get a compiler and see what you can make it do - is on a par with YouTube: ineffective and misleading.

But any way to learn requires effort, not just reading: you need to do the exercises / homework that is part of it as that's how humans learn - by doing and making mistakes, not looking at somebody else's stuff.

Starting with C++ is probably not the best way: I'd start with C# as it's a lot more "user friendly" (as it should be, it's thirty years lounger!).
And remember: there is no shortcut. Experience is what drives the knowledge and mindset home, so you need lots and lots of that!

Books wont help alone, you need to write some code in real projects. Only real coding shows what you can solve and where some skills still are missing.

I have condensed my experiences in How to Start the Homework or a Developer Career?.

Read it to learn from my 20+ experience. Developing software is more than coding but als discussing, testing, documenting and deploying processes.