Hard to say... but lord knows I hope that you'll have a better idea as a result of perusing the better offerings of the site. I have found it useful to compare my performance against the theoretical optima that I see documented here, rather than just the work of other developers, in order to push myself. Hell, that's why I went back to grad school in the first place (and went into methodology, eventually succumbing to math envy, as it happens).

perhaps it's just time for me to go do.

If you look on the front cover of your copy of SICP, the little yin/yang has 'eval' and 'apply' halves. Another endlessly useful shorthand metaphor, IMHO... It's always tempting to go too far in one direction or the other, but fortune seems to favor those who balance the halves.