Hello Raghu and welcome to the forum,
Your story is not ususual, there are many people here from a similar background to yourself, experiencing similar issues. I suggest you have a good read of the main forums and view The Mens Guide
To answer your questions:
To attract girls, the best general favourite amongst users here is Ammo. I suggest you read more about this.
For job interviews, some like A314 for alpha pheromone product, this is class. Others like to use communication products like Instant Openness and Instant Honesty to help with confidence and to draw people to you.
You can purchase samples, and to do this go to the Androtics/Smartmones Store and click on the ‘to go’ section. Here you can buy small bottles - great for getting started.
Tisha should be online again soon to provide you with a $25 USD gift certificate.
Best of luck, and let us know how you go! 