Hi VanSimpko - Welcome to Pherotalk.
You will need to do a little more than just bung-up a post to get your GC, have a read of this thread for the sort of info that will help us offer better advice:
https://pheromonetalk.com/t/how-do-i-qualify-for-a-25-gift-certificate/19934
Then have a read of this one for all the basic info on phero use - eg dose, application points and types:
That should set you up nicely! 
However, for a simple test of phero effectiveness, I would suggest you have a look at Instant Shine - which prompts a happy/feelgood mood in you and folk around you.
As you have a gf, you might also want to consider TUTH - Which does interesting things for sex with a partner. TUTH is not so good socially (esp in younger folk) and it can backfire on you in more general situations, making you seem overly horny/agressive because of its none content and sexual steering molecules. Ammo, a balanced social/sexy/attractive formula is a much better choice socially - esp when combined with Instant Shine.
All of the above are pheros that give a clear and easy to use demonstration of phero effectiveness and when combined with the right behaviours, produce good consistant results.
Have fun!