As a player, you can create 2024 characters using the rules in the 2024 PHB and as per the character creation rules in this document described above and bearing the following in mind:
Compatibility. Only 2024 PCs can use 2024 character options.
Older Options. You must use the 2024 version of any character option and can’t use an older version unless no 2024 replacement of it exists. This includes classes, subclasses, species, feats, and spells (but does not apply to backgrounds as discussed below).
Languages. You know Common and your choice of two other languages from the Allowed Content document except for Class Languages. You still can learn one free Ethnic Language in addition to this.
Customizing Backgrounds. You can customize the listed 2024 Backgrounds:
Older Backgrounds. You can use older background options (including 2014 background options reprinted in 2024) and use the 2014 rules on Customizing a Background. If you use an older background option in this way, you gain +2/+1 to two different ability scores or +1/+1/+1 to three different ability scores. You also gain an Origin Feat (unless the selected background already provides a Feat).
Older Species. If you use an eligible older species option, including Lineages from Van Richten’s Guide to Ravenloft, don’t apply any racial ASI bonuses.
Official Updates. Any 2024 characters created are subject to change as new source material is released by WOTC and players will receive a free full rework for affected characters as the need arises.
DMs can run games using the D&D 2024 ruleset described in the 2024 PHB and new sourcebooks as per the following:
To help gain familiarity with the 2024 ruleset compared to the older ruleset, players and DMs should refer to the D&D Beyond PHB 2024 Update, as well as the server’s D&D 2024 Changelog document.