There's a stickied post at the top of this forum which links to this page:
http://wiki.project1999.com/Guilds:Guild_List
That page has a summary of (just about) every guild on the server, and it has them separated in "Casual" (ie. non-raiding/for newcomers) guilds and Class R/C guilds. As you can see, you have a number of "casual" guilds that you can choose from, and the page will give you more info about them to help you decide (and tell you who to contact if interested).