Post a character sheet, and optionally state your intended build.
Mythweavers has a template for 5e character sheets, so storing your character sheet there is advised, but anywhere I'm able to access it is fine.
You'll need your own sourcebooks. Now, I'm not saying you should just go download some if you don't own them, because that's illegal and bad and wrong, but I'M JUST SAYING I know they're out there since I downloaded them myself AFTER I bought the physical books from the bookstore. I won't ask where your books came from.
We're starting at level 1, using Point Buy for stats, and the optional rules in the Player's HandBook (Variant Human Traits, Multiclassing, Feats...) are allowable. I'm also ruling that spells that use attack rolls are usable with Sneak Attack.
I'll be taking 6 players to start with. Applications will be accepted on a Best Fit basis, and more players may be added to the party later, so don't feel discouraged once there are six applications. Heck, don't be afraid to use a race or class that's already been picked, you can never have enough meat shields or whatever.
I'm reserving one spot for a divine caster (cleric, druid), an arcane caster (sorcerer, warlock, wizard), and a stealthy person (rogue, possibly a stealthy ranger or monk). You'll probably also WANT to have a melee specialist, but I won't stipulate that.
The Uncommon Races (Dragonborn, Tiefling, etc.) are permissable, but Drow Elves and Duergar are not (they're with The Monstrous).
NO evil-aligned characters.
Due to World reasons (see below), most of your contacts or rivals or whatever will be largely irrelevant. You'll all be given a Contact, the head of your race's civilization, at the start of the game.
There will be several environments and scenarios encountered, so over-specialization could be crippling. You'll be inside, outside, underground, in the wilderness, in small towns, at guardposts, in ruins and caves, in large enemy cities, every flipping where. I think ruins will be the most common and enemy cities will be the most difficult, and quests that take place inside friendly cities should be quite rare, but it'll depend on community votes in the end. You'll encounter evil-aligned sentient enemies much more frequently than "wild monsters"; you'll be fighting Goblins and Bugbears more frequently than normal bears or Owlbears, with undead and demons later on.
The class features that need to be unlocked by Civilization buildings are:
Barbarian: Primal Path (lvl 3)
Bard: Bard College (lvl 3)
Cleric: Channel Divinity (lvl 2)
Druid: Druid Circle (lvl 2)
Fighter: Martial Archetype (lvl 3)
Monk: Monastic Tradition (lvl 3)
Paladin: Sacred Oath (lvl 3)
Ranger: Ranger Archetype (lvl 3)
Rogue: Roguish Archetype (lvl 3)
Sorcerer: Metamagic (lvl 3)
Warlock: Pact Boon (lvl 3)
Wizard: Arcane Tradition (lvl 2)