Long time lurker, infrequent poster. Experienced drug user here. I thought I'd sign in for once and offer my advice.
Firstly, I don't know your exact situation regarding friends and family, but 15 is the worst age you can be if you're feeling a little socially inept, left out and generally depressed. It does get better on it's own after you leave school though.
Now, it seems you're gonna do this, so my advice would be to take 2 thirds of the pill. I know the exact pill you're talking about. Go a half if you want, but two thirds will be a more full experience and shouldn't be too overwhelming. This is a decent dose mind you. Not excessive but decent. Don't take the whole thing though.
As others have stated, the nature of MDMA is very very social. Do you not have ANY friends? I mean, even a couple of nice souled female friends? Pull an all nighter and hang out in a park, or someone's basement, talk, have fun. Even if you're the only one taking ecstasy, you'll probably wish someone was there, and it would be a shame to experience that magic for the first time, alone. Or, are you into music? Save it for a concert you want to go to. At events, people on MDMA literally make great spontaneous friends every 5 minutes. Imagine having no inhibitions towards starting conversations with complete strangers. You may get a taste of what you're missing in your life at the moment. A taste can be valuable, but you have to integrate the experience and learn from it.
Another thing, lots of people here already know about this method you use to obtain goods. They generally don't like people referencing that site here. Not only does it compromise your security, but people like to savour the special things while they still exist. Believe me, it needs no more exposure.
Lastly, please tell me you didn't order raw nbome powder? A 15 year old taking MDMA is pushing the boundaries, but at least that is comparably very safe. Nbomes are very new, very unpredictable and to be honest, people have died. Even with blotters, please please be careful.
Good luck with your roll buddy.