In a small way, the question is kind of like saying, "I have a concert to do next month and I'm hoping that someone here can teach me to play the saxophone by then." You simply cannot shortcut the learning process, nor the creative process. So much of it really is experimentation, even for those who have been doing it for years.
I recently took BJ Guyer's excellent online class on Foam Sculpting (his second course for the Stan Winston School of Character Arts), and he said often that you just have to get in and start doing it and seeing were it takes you and what you can do with it. He often starts working with nothing more than an idea, and not necessarily a technique.
If you're a serious student of learning to build puppets, you may get a few tips here, but asking for something more involved like this is less likely to pan out.
I have spent not only a lot of time, but a lot on money for materials. On top of that are the expenses of classes and books and DVDs to learn the skills. Quite honestly I don't feel like it is my place to give away the information that others are selling. I purchased it and so can you or anyone else who wants access to it.
I know it's been pointed out here before, but PlaySoup has an excellent DVD on puppet patterning for more than a basic round shape.
The Grey Seal book and videos on nip-and-tuck foam puppets are anything but plain round shapes.
The first two sessions of BJ Guyer's first live three-part webcourse from Stan Winston School of Character Arts are now available as on-demand videos, either online or on DVD. Part three should be coming in the next few weeks. The three parts constitute a 12-hour class on building a patterned foam muppet-style puppet!
I appreciate needing to work on a budget, but sometimes we just have to save our shekels to be able to afford to buy the resources we need.