Sorry Suprit for the delay in posting this answer.  Because of Covid, I have been in seclusion for nearly one year.  Today only I saw this question.  I am not sure how useful my answer is going to be.  Hope for the best.

The fact that you have completed all the sessions and worked all the examples itself signifies the completion of the course.  You just need to code the mini project in your own way and compile the code under a C++ compiler under Linux / UNIX.  That should be enough for you to understand all the concepts of C++ programming.

MLS Shastry