Hello,
my name is Liliana, i have over ten years of experience as a designer, and what i like most is illustrate, that's why i like this project.
Please, visit my Freelancer portfolio https://www.freelancer.com/u/webpolis.html
there you can see some of the cartoons i made, in order to evaluate my work, my style of cartoons is very similar to the images you attached .
I can send you more samples, if you want to.
I use Illustrator for this kind of projects, i can deliver you the cartoons as vector format, and also saved as any other format you may need, like JPG, or transparent PNG, for example.
I found this project really enjoyable and interesting, and i would like to create originals, expressive and fun cartoons, like the attached sample.
I hope we can work together, please, contact me if you have any questions, or if you want to see some more of my work.
Best regards.
Lili.