Learn how to declare arrays and other structures.
Learn how to make your own structures.
Learn how to use input routines and output routines.
Learn conditional statements (if then else endif or equivalent, switch statements), loops (do while/ while do (they're different), for next or equivalent, do until).
Learn how to do arithmetic stuff, subroutines and functions.
If available learn about pointer referencing. While reading C, I prefer to read * as "content of" and & as "address of". Much easier.
Learn about all other available functions for graphics, web, Input/Output, System calls, Library calls, Sockets.
If you can, learn procedural programming with structures first then learn object oriented programming. You're just starting: don't try to be an architecture astronaut yet.
Most important: have fun.