Hi sasa, going through the bridal magazines is a good start, you can see the details more. There are plenty to see in kinokuniya.
Another way to narrow down the designs is to try the gowns of diff cuttings. To find which designs suit your bodyshape best. There are bustier, halter, off shoulder, ball gowns, A line, etc...
Last time i use to like halter neck kind, but later find that bustier ones suit me better lor.