When should I start using Allegro? Thread

(Noob here)

I started learning with ANSI C few months ago.And also learning Digital electronics.Even though C is like the first language I am learning but I did Java in High school but not much at all.And in fact forgot all those.I want to program my first game and I researched a lot about it and found that Game Engine like GameMaker is fairly easy otherwise after knowing basic of respective programming language I can also start with .And I could easily understand GML.
Now as I started few months ago I really don't know much about C in depth.
But I want to make a game in a coding heavy approach as simple as pong but with Allegro rather than with the help of a game engine.Because I like knowing stuffs in depth

My question is exactly how far I should know in C to start using Allegro's graphics libraries.
What I know in C in depth:
All Conditional statements and how those works

All types of Loops and how those works.

1D and 2D Arrays.

Binary search Algorithm

Quick Sort , Bubble , Insertion and some other sorting Algorithms.

Few other algorithms using Array , loops and conditional statements.

Strings/Character of Array.

Things I know but not in depth :

Pointers

Functions

Basic File management

Linked List.

Thank you in advance (:

Edited by: rupu1234