To open the guild tab you need to press Alt+U. Or select "Community" in Lost Ark Gold the lower right side of the map. Then, select "Guild" by clicking the "Pop-Up Menu. Then, you will be presented with the screen for guilds. On first glance, it will list all the guilds which are seeking members. They can have as many as 30 members in each one in the beginning.
To start a guild you'll need 2,000 silver. When you're on the Guild tab, look at the top of the panel and select "Create Guild." Put in a guild name, an explanation, and after it's clicked "Create Guild," your guild will be formed. When you're creating a new guild, you can keep the "Add to the list of suggested guilds" selected to ensure that your guild appears in the list of Suggested Guilds. They can then invite others to join your guild or join immediately.
Once your guild is created, you can organize it with the help of the Arrows on the top of the panel and choosing "Manage." While there you can edit your guild's flag, alter names of your guild, modify your guild's leader, modify the settings for joining, and much more.
The current limit to guild members is 30. Guilds have to meet goals and make donations towards the guild in order to level it up and increase the number of Buy Lost Ark Boosting members they can accommodate. The Level Benefits tab will let players know what benefits are for each stage of the guild
