Hi Raphael - Welcome to Pherotalk! 
We were all pretty sceptical on arrival here but I hope you will find that the pheros sold here do live up to an honest appreciation of their qualities - ie they are no magic potion and they won’t make girls fall into your bed at one sniff.
However, with the right attractive personality and approach, you will find they do help make things a good bit smoother and easier. Then, every now and then, you do meet someone who is just bowled-over by them and that is indeed fun! 
As for what to start with - As you are sixteen, it is very likely that you are producing a high level on none naturally. This falls as we age and the other thing you have to contend with is that girls around your age are at their most sensitive to androstenone, so are liable to be repelled by strong/overtly sexual products, again, this changes as they age.
One of the biggest mistakes that young guys make with pheros is to use heavy none products on top of their natural signatire and then wonder why the girls avoid them or end-up attracting their mothers/grandmothers instead!
However, you can moderate and channel you own none production with the social products - Particularly:
Instant Shine - Creates a happy/feelgood/socially confident/centre of attention feeling. Works great alongside almost any other phero/mix.
IO - Promotes flowing conversation and takes the aggressive edge off none.
IH - Deepens the quality of conversation and encourages interpersonal bonding. A great follow-on from IO when dating/getting to know someone.
IG - A light cool/smooth/suave status product that helps make a real impression. Very suitable for your age.
As for sexuals, about the only none product a sixteen year old might need is Ammo - A balanced sexy/social/masculine mix of the three main pheros (none, rone and nol) that again is not too overt and usable in a range of social/school/work situations. You will need to test to find the effective dose but I would expect it to be pretty low.
I’ll also say that whilst AD’s DHL delivery to Europe is expensive, it is also by far the fastest and most reliable. Generally only taking a couple of days. Other phero sellers can take weeks and often arrive with a whopping EU customs charge that wipes-out any advantage in cheaper shipping costs.
ETA - These threads cover all the basics of choosing and using pheros effectively:
Learn them well!