Working the CCNA exams with GNS3 software is a great way. But, you need Cisco IOS images for GNS3.
You can use many Cisco IOS images on GNS3, but most of them may be problematic.
I would recommend reading the related article to download Cisco IOS images running in GNS3.
Thanks, I dont understand how Cisco expects freshers to learn outside of a corportae enviroment. Like I dont have money or a job or my own business how would I get these cisco images otherwise?