How worried should I be about knee hyperextension and knock knees?

How worried should I be about knee hyperextension and knock knees?

I've tried to correct it, but every time I do it always falls into then being hyperflexed. Doing it the normal way is; one very difficult to even know if im doing it properly, and two its like balancing a bowling ball on a finger. My knees will shake right away and fall back to place. I also have knock knees which im sure contribute or are an affect. Esthetically id like normal posture but medically im a bit concerned as well. I used to have perfect posture, but when I was about 10 or so my heds started deteriorating that almost immediately.

How worried should I be about knee hyperextension and knock knees?
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