Dude, don't fear drawing a cartoon strip.
Look at mine for flip's sake! It's hardly as good as most of the strips I read, but I care not. It's about the words and the story, not the art.
I like the sentiment there, but I don't think it's really fair to say that. I mean, you can't just say it's not about the art. The art and writing really go hand in hand. I don't care how well written a comic is: if it looks like crap, it's really going to take away from the strip (not that anybody's work here looks like crap, I'm just saying for the sake of example). Comics are a visual medium for a reason after all.
"The art and writing really go hand in hand."
-In some cases, the writting and artwork are symbolic of eachother. The art style and quality often reflect the mood of the story. Such is the case of comics like Rooster's and BobandGeorge and BadlyDrawnKitties.
Mmm. Or to use a more commercial example, Johnny The Homicidal Maniac.
Though, Rooster's right. While in the best comic strips the art and the words and the tone and the story and all that other stuff go together to make an experience, good art is in no way, shape or form a requirement. Especially for cartoon comics (as opposed to graphic novel comics) [and no, 'cartoon' there is not a degrading or childish term, unless suddenly I thought that I Read This, Ozy and Millie, Peanuts, etc were childish. Suitable reading for children, sure, but not childish themselves. It's simply being used to distinguish cartoon comics from such comics as Sandman, Johnny the Homicidal Maniac, etc.
Saying that, of course, I would genuinely be incapable of drawing a comic strip. Because my drawing is laughably bad, to the point that I often can't recognise what I've just drawn.
Additionally, frequent drawing is one of the best ways of improving your artistic ability, I believe. So since your humans are recognisable as humans (and presumably individuals) even if you don't consider them to be very good, you should be fine drawing a comic strip which would require drawing them since in doing so you'll naturally improve your technique and ability to draw humans.