When you open family siege it will look something like this
I will go through each part individually to help you understand what is going on

Buildings

Each family has 3 buildings, 2 Towers (Turret and Flag) and then a Capital
Each buliding includes 4 defense teams. In the Capital these are 3 player teams and in the Towers they are 2 Player teams.
Family members not in a team will be evenly split betweem the two Towers.

Super Families can occur when one Family has more then a 40% difference in Defense between two families
Rules behind them:

1. Super Families lose their status when a Family has a higher Defense then them, in this case the new highest will get the status

2. When the Super Families defense is less then or equal to 30% higher then the lowest it will lose its status

3. If Families have the same highest Defense, the one with the higher power in the Defense teams becomes the Super Family

4. Only 1 Super Family can exist at one time

What does super family do?
Members of the super family gain a low boost in points when attacking other families. Members of other families gain a high boost in points when attacking the super family

There is 3 types of Rewards, Family Ranking, Personal Ranking and Defense Rewards
The Personal Ranks are determined on total points earnt. If you get top 3 in this you will get a Limited time Title and Border
The Family Ranking is determined on total defense across the 3 days, for this you get some Remold Tokens etc
Defense Rewards are per day, if any of your buildings survive the day you will get the rewards for that building

Action Tickets

It can be tricky to set this up if you don’t have multiple sets already out of mode, I recommend doing some research at what you could use. Early/Mid game the easiest is probably something such as Plume Monarch & Warbringer, For Mid/Late you could use Martial Sage & Sacred Hunter

These sets utilise most of the same background (Souls etc) and have lots of cross over of use, it is likely we will see a change somewhere in the pipeline that makes this more suitable for all players but still awaiting

To attack you use “Action” tickets, you can only have up to 5 of these at a time and they will recover over time. Each defender can only be attacked once (But you can retry if you lose)

The mode uses 2v2 attacks via the shroomdoll so be aware of this when attacking - you can change the position of your 2 characters in set up (2 back 2 front positions)

Each Battle has a time limit of 5 minutes so don’t have to worry about stalls too much! (In case of stalls it will calculate of total HP both sides)

You will earn points on succesful attacks

Each building starts with 100% defense and becomes destroyed once hitting 0%, the capital cannot be attacked until both defense towers are defeated

Not all of the members in a tower have to be defeated to defeat a tower, as long as you defeat enough to reduce the defense to 0% the tower will be defeated

Defending members have Star Levels, those in Capital are 3 Star and those in Defense Towers are 2 Star, if not in a team then they are 1 Star. Member stats vary based on their star level, for example - 3 Star → 10% Team Defense, 5% Personal Defense, 5 Valid Defeats, 100% Default Stat Bonus

In Battle Report you can view both solo attacks/defenses and family status