What do you do now?
You're probably asking yourself at this point what to do now that you've read these files. Well, the first and best thing to do would be to find a guild. HELP GUILDS will show you what guilds are available and the command HOUSES will show you what houses are available for vampires. HELP <guildname> will show you some information on the guild and HOUSEHELP <housename> will show you information on the undead house.
If you have decided to join a guild, seek out Certimene in Delos. (HELP CERTIMENE) He will be able to induct you into a guild as a Novice (HELP NOVICES). However, if you have decided to join a house, seek out Kelende in Delos (HELP KELENDE). He will be able to bestow the bloodgift upon you (HELP NIGHTSTALKERS) and induct you into an undead house.
Once you have joined a guild or a house, the best thing to do would be to learn your guild skills with the lessons you have available to you (type STAT to see how many lessons you currently have).
After this, you may want to head to the Kingdom of Sehal (HELP SEHAL), the Valley of Lodi (HELP LODI), or the Valley of Kalebb (HELP KALEBB). You could also rid the major Cities of vermin (HELP VERMIN) or collect butterflies for Vellis for gold. Your City might have a nearby area for newbies as well. All of these locations can be accessed from the Portals of the Vagabonds (HELP PORTALS).
An important thing to do as quickly as possible is to gain some money for a backpack, or learn where the bank in the cities are (HELP BANKING). The reason for this is to have a safe place to store your money.
Once you've done this, the sky is the limit. The choices are up to you, but exploration is probably always a good thing. As you wander the land, you'll encounter a variety of creatures and people. Some will be hostile and some not, and many of the sentient creatures will have things to say to you. Greeting them with a friendly emote like HI or GREET will often elicit a response, and you may get clues this way as to quests.
Lastly, remember that a MUD is not a single-player game. It is designed to be enjoyed with other players, and finding a big player that will mentor and teach you is probably the best way to learn. Don't be afraid to ask for help from other players or Gods, and _please_ read the HELP files. Just type HELP on its own, and you will get an index of help files.