I've grown pumpkin from seed before. I usually will lightly wet small squares of paper towel, place a seed between two squares and set them in a ziplock bag (I like the sandwich size for this), making sure the seed is covered. The paper towel should not be damp with standing water in the bag. Set onto a sunny window sill and check periodically that the towel has not dried out (if it has, spray with a little water). Pretty soon, a root will push through, as well as a green stem and the first set of baby leaves. You can then transfer it over to some potting soil (with the top of the green growth an inch or two below the soil line - don't pack down too hard, smooshing your sprout!). Set back into your sunny windowsill and check the soil moisture periodically -- if the top two inches are dry, it will need to be watered. I usually set up small styrofoam cups for this, and once there is a health set of two leaf sets above the soil line, I transplant them to the garden by tearing the styrofoam cup down the side and transitioning the whole soil/root base to the garden space selected. The year we first tried this out, we started with about 10 seeds and lost 2 with a hard rain, but the others went crazy in the backyard. You'll definitely want to give ample space for these to spread and look for an area you don't mind have the vines over. Grassy sections left too much moisture under the pumpkins as they grew, so we added burlap underneath as a barrier (anything else that has the same result will work - this is just something we had on hand). We had pumpkins ready to harvest within 2-3 months from when we started with the seeds.