Improving?

[Dalenko]

Hey everybody,

I've been playing this game for a good 2 months now and my skill has come to a point where i'm managing to FC most songs of difficulty 7 and down.
I enjoy being this 'good' and I enjoy that my friends, who never played this type of game before, calling me sick for being able to read the arrows that fast.

Now all is well, but I do always want to have a goal in the game that i'm playing, and i'm starting to wonder IF there is physically a goal available for me.
I'm 17 years old, play 1.5x speed (comfort zone) and use ASKL key config, i'm starting to wonder though, if it is possible for a casual guy such as myself to keep improving from this point.
I'm wondering this because i've come to the conclusion that physically i am yet unable to even get near to a 50 combo on difficulty 12 songs - i can't read the arrows fast enough and my fingers can't move fast enough.

Conclusion: Is it possible for _any random person_ to be improving from difficulty 7 and on with the right practice, purely physically?

It might sound a bit vague, and it might BE vague, but to the ones that understand the uncertainty that i'm in atm, please answer my question.

Thanks,
Dalenko.