Good morning and welcome to Ravenholdt!
We're happy to hear that you're interested in roleplaying and that you've made an Alliance character. The Alliance has a great community and I am sure that they will be happy to greet you.
If you're interested in getting to meet some of us, I would recommend joining the /RP channel in-game. It's an OOC channel where RPers just hang out, chat, set up RP, etc. The activity within the channel varies, but it's a great place to ask questions, get advice, and just talk with other Ravenholdt RPers.
You might also be interested in checking out the Ravenholdt RP Sanctum (ravenholdt.us). It is the server's RP website and another great way to experience RP. A lot of our RPers post stories there about their characters. You can also ask questions about certain types of RP, collaborate on events, or just post in the OOC forums.
As for guild ideas, I will do my best to list the guilds I can think of, along with contact information, and their general focus. Hopefully it will give you a place to start!
<Hallowed Brotherhood> is a new guild that I recently learned about. It is led by Keegore and he explained the guild to me as something like a Templar's guild.
<Twin Seas Trading Co> is a trading/merchant/perhaps pirate type of guild. If you're interesting, talk with Jarington.
<The Righteous Light> is a Holy order type of guild. Stepanos is the guild master of this guild.
<Pax Umbris> is a loose coalition of people seeking peace in whatever ways that they can. Talk to Ryoka if interested.
<Stormwind City Guard> is a guild of guards who patrols Stormwind. I'm unsure if Dwarves can be a part of the guard. But if you're interested, speak with Dashaun.
<The Sentinels> is a family-friendly, RP-friendly guild. I believe they're loosely based on freeing Lordaeron from the Forsaken. If interested, speak with Virina.
<Reprisal> is an RP-friendly guild more focused on PvP and some PvE. Talk to Eohnavi, Kinian, or Genesee.
<The Indelibles> are a social guild with RP-friendly players. Talk to Cayreth or Oolaki.
<Twilight Empire> is a large guild who seeks peace with the Horde. You can talk to me about it, though we'd love to see some of the other guilds gain more people to add some really fantastic dynamics to RP!
<The Nights Veil> is a mercenary coalition type of guild. I am not sure if they are recruiting, but if you're interested, speak with Arashia.
...I think that's about it. If I forgot a guild, I apologize! I really need to keep this list written down somewhere. Hopefully that gives you some insight into what's available. I would be happy to answer further questions if you have them!
Also, if you would like some bags for your new character, I am happy to provide those. Just let me know!