5e- 5e is short for "fifth edition." This refers to the most recent version of the official D&D game, as it has received many updates since it first came out in 1974.
Dungeon Master/Game Master (DM/GM)- The Dungeon Master (DM) is the one who leads a game of Dungeons & Dragons. They walk the players through the story and are responsible for determining the results of player's actions and dice rolls. The term Game Master (GM) is often used interchangeably, but can be more easily applied to other types of TTRPGs.
Homebrew- Unofficial D&D slang referring to non-official campaign information, typically designed by the DM/GM. For example, if the DM decides not to run a premade campaign and instead design their own world with its own environment, politics, and conflicts, that is a homebrew.
TTRPG- TTRPG stands for "Tabletop Roleplaying Game." D&D is one form of a TTRPG, but it is not the only one. Other popular TTRPGs include Pathfinder, GURPS, and Call of Cthulhu. When researching Dungeons & Dragons, you may consider broadening your search to TTRPGs.
World-Building- Refers to the creation of a specific world within the game of D&D, often at the hands of the DM but contributed to by the players. This includes the world's setting, lore, politics, culture, characters, etc. Some groups prefer to have very complex world-building.
For the more common, extended options for D&D 5e, one can consult the D&D Player's Handbook.
When searching for additional resources, casual search engines like Google may prove useful. Be sure to consider:
Image: Sources [Compendium], D&D Beyond
Along the top toolbar of D&D Beyond's compendium, there are many useful resources. Under "Game Rules," users can find many detailed sources specific to character building, including information about races, classes, spells, backgrounds, feats, and more. These resources are particularly helpful for players who do not have access to the core rule books (See: Official Books).
Matt Mercer is popular among D&D communities for his work as Dungeon Master on the hit web series Critical Role and later collaborative works making official D&D material with Wizards of the Coast. In this interview on the official Dungeons & Dragons, Mercer discusses some tips for DMs. He addresses the benefits of seeking positive online forums and communities to trade ideas and share inspiration, as well as the importance of staying flexible in-game. These tips can be useful for anyone looking to become a Dungeon Master or just strengthen their DM skills. Mercer has more videos regarding tips for DMs on this channel as well as the YouTube channel “Geek and Sundry.” (For more information on Matt Mercer, see: Modern Media Representation)
D&D is abundant in resources for new players. After selecting their "New Player Guide" at the top right menu, you can also find a specific area for New DMs including videos and lists such as 7 Tips for New DMs.
(For more information on long distance D&D and mental health concerns: See: Benefits & Applications: Mental Health & Therapy)
This photo serves as an example of what a virtual D&D game on Roll20 may look like.
The StartPlaying "Find Games" search option allows you to search for games based on your specific needs. Search by game system, type, your availability, and your budget. To find D&D games on StartPlaying, Enter "Dungeons & Dragons" in the Game Systems bar. Be careful of autofill options, as there are many versions of D&D available. The most common version of D&D and the one discussed in this guide is D&D 5e (fifth edition).