I wouldn’t recommend C or C++ to be your very first introduction to programming. You’ll get hung up on syntax without learning the more important fundamentals such as program structure, procedures, functions, objects, data structures, etc.
Look up the class info for whatever UCLA’s CS 101 class is to see what language they’re using. You might even be able to buy the book and work through it. Otherwise if the language is python or java you can just go buy an introductory book like “Java in 21 Days” (I made that up) and work through it on your own over the summer. If colleges still teach Pascal that’s a pretty gentle introduction to procedural programming that’ll set you up well to learn C/C++ later.
Alternatively, you could do something fun like learn web design. That would get you introduced to scripting and such, and would be something fun and practical to learn. Anything where you get your hands dirty with some code will help.