Thanks @Leo for your advice, I'm going to try to plan my time better to see if I can study more, although really my only intention is to finish this script and return to my normal life, without any code.
Thanks to God and the help of all of you, I finished another script that I was very interested Resize Image
Now I'm going to study a lot about push_back, I should have done it before, but I didn't know it was a method.