Q: What is better, joining a Guild or making your own.
Depends on how are you new to game, if you are new, then you need to learn it, possibly with a guild.
Making own add extra in-game responsibilities, like recruiting and up-keeping it.
What is the Pros and Cons of each.
In a guild you can have following benefits:
*People who you can help and ask help from them.
*Guild Hall, a dedicated outpost for you members and alliance members. Depending on fullness, you can buy materials, runes, merchants, etc.
*Activities which you can do together. Depending on your members.
*Guild cape.
Following cons:
*You may need to be active.
*You need to recruit if you are leader or officer.
*You need to do considerations like upgrading Guild Hall and promoting members to officers (caution must be taken when promoting members).
Also what do you need in order to make your own Guild.
*Register guild for a fee.
*Make a cape(designs can created by you) for larger fee. (Optional)
*Buy a Guild Hall (a large fee, like 10-15k), (Optional)
*Upgrade Guild Hall (fee may range from 5k to 100k), (Optional)
More info:
http://wiki.guildwars.com/wiki/Guild
http://wiki.guildwars.com/wiki/Guild_hall