Do you have a manager? Do you NEED a manager? There is a lot of confusion around the kind of help having management can offer. Does it really open doors? Or is it just a shortcut to a door you may eventually open yourself?
Things to consider:
Some comics book all of their own gigs (i.e. Elayne Boosler, "Comic Insights", Silman-James press)
Young people can rise quickly (i.e. Aziz Ansari, Donald Glover), getting big writing credits and cast into shows with big stars. Did they do it with the help of management?
I have heard that Saturday Night Live casting will not consider letting someone audition unless they have managment.
I do not have a manager (and no one's offered). Would I consider it? Sure. 15% of nothing is still nothing.
But, unless your career demands are overwhelming you (unlikely), I don't think you NEED one either. A good manager can def help open some doors. But lots of people have managers and get little/nothing as a result.
I guess I think the big misconception is that a manager can take a nobody and "make them" overnight. I think a good manager can take heat and make it hotter. But if you're doing nothing right now, I think it's unlikely that a manager will come in and turn you into an overnight sensation.
In reality, most people who think they "need a manager" probably should worry more about getting funnier. That's the best way to make things happen. Be undeniably good. Do that for long enough and good things will happen.