learn the concepts and concepts, the syntax comes with practice. If there are any points you don't understand, copy and paste the code in the editor, make it work and write your own comments
find a project that is simple to code, but slightly difficult so as not to get bored
the tutorials are good, but they only show what they want to show. Adapt their content to your reasoning. Don't fall for tutorial purgatory
With what you have learned, first solve your problem with an algorithm, then code it!
For any language:
Some projects to begin : reddit.com/r/Cplusplus/comments/80...