On the other hand, now that I think about it, I've seen a number of artists jump straight into the stick figure stage while gesture drawing. To me this is a little crazy, but it definitely works for some!
On youtube there are even some boggling people who start at just drawing the fully formed human -- I am impressed by these videos, but also find them disheartening as they tend to rank highly when a student does a search for gesture drawing. I think it creates the wrong impression and sets a too-intimidating bar. I also wonder if those artists have not just trained themselves to see "outlines" very accurately, and wonder how solidly their foundations are rooted in underlying anatomy. What would happen if they had no model, for example? I really don't know.
To summarize my follow-up rant: Artists work very differently. You will probably need to experiment to see what works best for you!
My best advice is to work large, so you can fit a skeleton and eventual flesh inside/on top of the original gesture and still see the details.