How about this angle,
why don't you try and mastrubate a bit more, and find out what it is that really turns you on. Once you know what really makes you cum, you could try and achieve this with someone else. I found that once I knew what really makes me cum, I can control my climax much better, and even join in on the multiple orgasms.
At first I needed visual stimulation to achieve my goal, but as I got better I kept reducing this until I could cum without anything but the thoughts in my head. This also helped me to get turned on by my own orgasms.... causing me to be even more turned on after cumming
I have a little training program you could try if you like.
Start off with all the porn you find erotic to get you to cum. You might just be surprised what you find, and don't hold back on the topics, try them all, even the ones most people don't regards as normal.
Remember, this is your fantasy, and your alone.
Next level would be to only use the porn, your porn, for the last half until you cum, start off with nothing.
Next level would be to use no porn until you come, this can be really difficult.
Next level would be to alternate the way you do it:
only two fingers
only the shaft
only the glans / bulb
Next level would be to alternate the hands you use, believe me getting myself off with my left hand is still difficult.
Last level, would be to cum more than once.
Bonus level would be to massage the prostate until you cum, but this is rather advanced.
I don't hink there is anything wrong with you, but you might not be in sync with yourself and your own desires. Sure we all have diffrent ways of really getting a good orgasm, but one thing that rings true is...
"Practice makes perfect"
I hope this helps you.
PS. If it hurts, please stop, or else you might just do damage to the little one. It's like going to the Gym, you need time, and you don't look like a body builder after this first time.