You can do two things to learn:
1- download heaps of scripts and take a week to study them, practice with the syntax, know what's a procedure and what's a function, also how to use variables/const and its value, know to use IntToStr() and how to make your own procedures, and how to call them... (Learning the theory and then writing things)
or
2- just start with simple Hello world and start adding functions/procedures you can find in
here and
here. (As you do it you'll be getting skill, learning of your own mistakes/find out where are the syntax errors, or even remember whole procedures so you haven't got to copypaste them in the pages above, a must-to-learn is WriteConsole, per example.