The tutorial here at cplusplus, though it hasn't been updated in years.
http://www.cplusplus.com/doc/tutorial/
A tutorial that is updated regularly is Learn C++
https://www.learncpp.com/
Write code. With a modern compiler that can support the current standard.
Post your code here (A biggie!) and ask questions when confused or not sure.
Help us to help you by posting code with code tags (An even bigger biggie!!!). PLEASE!
http://www.cplusplus.com/articles/jEywvCM9/
When getting compile time errors, post the ENTIRE error. Not just a self-written summary. You may not understand what the error is, from experience many people here do.
When getting feedback DO NOT take it personally. Some people are very blunt when offering advice or criticism. In the long run that is a good thing, you can learn a lot from that type of feedback.
When getting feedback with code snippets, especially with C++ constructs you've never seen, PLEASE don't complain. The code might show things you've haven't learned yet, or if it is an assignment using parts of C++ you can't use. DO ask questions about what the code snippet does.
I personally have learned more about C++ since being active here than I ever did trying to self-teach myself.