Dude, you're just not quite there yet, have not quite matured enough, it will come eventually, if you have started getting maybe a little bit of pre cum then you are on your way, just keep wanking it will come eventually, im sure nothing is wrong. you're only 14 buddy you might have a 2 1/2-3 inch penis now you're so young XD
Hey, I'm almost 13 and I can't even cum yet so don't worry. The only thing I'm good at is ducking my penis and masturbating. HaHaHa! If you are able to feel like cumming, then start trying to suck little buddy down below. You're probably really close to your goal. My boyfriend is already leaking probably 1/2 cup every day up my ass and in my mouth. Don't freak out though if you get some in your mouth cuz if you do, it will be worse. My first time I got cum in my mouth, my boyfriend had been knocked out while we were ducking cocks. You would probably leak everywhere. I wish you luck though. Keep trying!