Can you post some links to courses you have looked at? It's hard to say which is more suitable without looking.

The other questions are about you - Have you ever taken an online course before? How well do you learn independently? Are you able to look at books, tutorials, and example code and learn from those? Can you learn something new without having a tutor or someone else to ask questions to? Do you have someone who know C++ who you can ask questions to?