Summarize:

Try not to move your nails too much or the polish may smudge.  Wait 10 to 15 minutes for the polish to dry. If you apply a second coat too soon, it will only smudge the first coat. You may be able to speed drying with a fan, but don't be overly optimistic.  By blowing the fumes away, the fan will remove one reminder of continuing wetness.  After the first coat has dried, apply a second coat if you'd like. This ensures the color looks rich and even. After the color coats have dried, you may add designs, by brush, airbrush, mask or stencil, decal, rhinestones, or otherwise. Skipping the base coat, or even applying only one color coat (depending on the kind of polish and application technique; some give or appear to give more even color with uneven thickness than others), will often give acceptable results.  However, extra layers add a little extra to initial surface quality.
Let your nails dry.