Hello Kim! Welcome to the forum babe!
Oh boy, you’re 16 huh? you’re maybe a bit too young to start off with too much products because you’re body still still transforming/changing naturally and we wouldn’t want to mess with that.
lol, I’m a poor student too, so I can relate lol, I live in north america so the shipping/fees is lesser than that, you poor thing lol. Just to tell ya sweetie, pheromones wont magically make a girl attracted to you, 90% is you and 10% is pheromones. If someone doesn’t like you at all no matter what, pheromones wont change their minds, but if you use it on someone who is already interested in you, it’ll make them wonder what’s so new with you 
Alright, now to the suggestions. I think you’re too young for ammo, you’re probably starting to produce those “pheros” a little naturally already, so you wouldn’t want to mess with your body that’s still growing.
Since you’re really young, I’d suggest you only instant shine (it’s a mood uplifter, it’ll make you feel confident too, while it makes others around you in a jolly mood) or instant openness, it will make people feel comfortable talking to you for a longer time, thus making conversations between you guys flowing easily without any awkward moments
Use them as little as you can though 
Hope it helped 
Edit: I just saw that you’re 15 in your profile? Hmm, really go easy with the pheros now cause you’re really young, I’m being such a mommy but I don’t want you to mess with your body that’s still going through a growth spurt. When my sister was 16, I wouldn’t let her touch anything else except for instant shine/instant openness. Once you’re 18-19-20ish you can use other products 
About the gym: lol, make sure you just look healthy and have a great personality, and girls will be attracted to you already. 