The upward bend is very common, especially for teenage guys and guys in their 20s. It settles down a bit with age. But I'm 40, and when I'm really hard, it still bends way up.
What I did years ago helped a bit. I would masturbate no hands style, with my penis tucked downward in my underwear. The penis would get hard, but curved downward. You could always use a vibe to speed things up on the orgasm front, as no hands masturbation tends to be very slow.
That aside, your upward banana tilt is very normal, and its a sign you have a really strong erection. I wouldn't worry - in fact, I'd see it as a healthy sign.
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