Hi Amir - Welcome to Pherotalk. 
Now we have some idea of who we are dealing with, it is much easier to make some suggestions.
Broadly, (ie there are exceptions) women around your age find a wider more social/sexy/masculine phero signature more attractive than a very overtly sexual/status signature - which is something they tend to age into as they mature. IME, the mid 20s mark the start of the change, which is usually most apparent by the time they hit their 30s. This is why I wondered about your origianl idea of NPA or A7/A314 mixes, as they are hefty on the Androstenone and Androsterone, with little in between to soften the sexual or status impact of each - Fine around older women but a bit much around many younger ones. Although you do get the odd exceptions, but mainly in already sexually charged/uninhibited situations like clubs/parties etc.
So to start off with, you should seriously consider a product like Ammo, a selection of socials and IG.
Ammo is a balanced mix of the three main pheros - Androstenone, Androstenol and Androsterone that signals good thngs across the board and can be used in a wide range of situations.
Summer Ammo is a variation on this formula with two extra molecules that help make it more chilled-out and social, especially around younger women. Its scent is also far better IMO and maybe more suited to European senses. It is also less strong, which may be an important consideration at college?
Instant Shine - Happy, feelgood and socially confident. About the most all-round phero sold here and combines well with many products, particularly Ammo.
IO - Helps promote conversation and helps you approach/be more approachable. Very useful as you say you need a bit of help with social skills around women. IO also helps take the sexual edge off Androstenone products and pairs well with Ammo and even TUTH in more raunchy environments. Good alongside most other pheros but I do find it weakens A314 unduly.
IH - Also good for conversation but in a deeper, more bonding way. more a “second date” and beyond phero but I do find the IH/IS combo a good alternative to IO as it gives better quality conversation and goes well alongside A314.
IG - A light, sociable status product, mainly Androsterone that helps make a very good impression and is steered in a way that makes it more suitable around younger women.
A314 - OK, this is a mature product but in your line, it will help you professionally - esp the oil version, which is usable in low scent environments that are common in medicine. I do very well with it in the bio/bio-medical sciences sphere. A314 conveys a strong impression of professional competence, status and trust. Which is what makes it so good at work but maybe does not help it in dating as it can get taken as a bit too serious and only after a solid LTR. However it can be useful around your age in low doses alongside Ammo and the likes of IS.