@nipushar welcome to the Amibroker forum. To get you started on the right foot I would suggest a few things things for you to go through:
First you need to verify your license..... License Verified badge
Then read through this..... https://www.amibroker.com/guide/a_language.html
And then if you need to come back to the forum for help..... How to use this site
Good luck!