Royal Cat,
I'd begin with the ascendant sign, then the ascendant ruler (if Pisces is rising then Neptune rules the chart), where the ruler is placed and how it is aspected.
Since it's a wedding chart, the relationship (aspects, if any) between the ruler of the 1st and the ruler of the 7th is most important.
The Moon sign, house and aspects are also very important.
Venus & Mars and what they're up to.....
Every planet plus angles have an importance, just like a natal chart.
As the years progress, you can progress the chart, just like one would a natal chart.
AG