Where to start in SDL2 game design

[367kGNh0]

I have mastered two C++ courses. I've, from memory, learned to make calculators, multiple choice quizzes and other lame software that only would've been noticed 12 years ago. And I still have no idea how to make a menu screen, visually. In a console, that'd be easy but I really need a tutorial for making a graphical interface in C++.

Thank you.