Hi PBK - Welcome to Pherotalk.
I hope you will find that this is probably the best and most genuine Phero site out there - There are a few other of course and you will learn who if you read a bit more but IME, the best understood products and methods of using them are discussed here.
If you want an idea of what is needed to get you started with your GC, have a read of this:
https://pheromonetalk.com/t/how-do-i-qualify-for-a-25-gift-certificate/19934
And for the basics of phero use and application, dose etc, have a read here:
And I would suggest that for starters, Ammo and Instant Shine or IO are the best - They demonstrate the effectiveness of pheros in a very straightforward, easy to use and effective way.
Ammo - Is a balanced social/sexy/masculine formula that is usable in a wide range of situations
Instant Shine Creates a happy/feelgood impression that is good for breaking the ice and making people feel great around you
IO - promotes smooth conversation
You can use them singly or together to great effect. 