That depends on the length. 3 inch dreads? You'll be rocking the pincushion look for a bit until they relax, and onward up to about six inches (of completed dreadlock length) until they relax.

Unless your dreads are close to shoulder length, or your hair is very thick and thus heavy, most of them will stick up, except for the ones that will stick out.

The shorter your hair, the more likely it is that tight bundles of it will be reaching for the sky. Usually after the first wash they loosen up quite a bit and start laying flat.

When you palm roll (because you are palm rolling, right?) you can try gently directing your new locks in the direction you want. You can also try taming them with a bandanna or scarf. They'll get the point eventually.