GETTING STARTED with ARDUINO 

Arduino for Beginners

Please read my disclamer before we start, I take no credit for this guide below.
Read this PDF file on Arduino for beginners on this link. Arduino for Beginners Rev2 All credit goes to Makerspaces and this guide was made by Makerspaces
Click on their link above to find out who they are.
It gives a great explanation on how to get started with Arduino along with simple projects to build.

Arduino IDE

Arduino Home page
All infomation can be found here on the main Arduino website.
Arduino IDE

You can download free software on all platforms from the Arduino IDE website and a lot more information can be found here.
Arduino IDE Software

Looking to build some projects, check this link out below. It has heaps of fun idea's for you to get started.
Arduino Project Hub