Before you start creating homebrew, please be aware that you have access to the same tool that the development team use to create content. This means it is both powerful and complex - and can be confusing at first.
The staff team have provided release notes, which are worth reading before you delve into these tutorials.
You should also familiarise yourself with the Homebrew Content Rules & Guidelines before creating your own content.
Undoubtedly the best way to create homebrew content is to find an element (monster/spell/item) that is fairly close to what you want and then use that as a template. This allows you to see how the designers have added the various abilities/bonuses. We recommend that you use this method for creation until such time that you are experienced with the homebrew creator and the content fields.
For these tutorials, we'll be using a theme for a specific scenario - we're running a campaign where the player characters have entered an area of dark forest, twisted by an artefact from the shadow dimension, so we're going to create monsters, variant spells and magic items to fit that for our campaign.
To access the Homebrew area of D&D Beyond, you must be logged in to the site, then hover your mouse over your username at the top-right of the page and click on Homebrew from the menu that appears.
This will take you to the Homebrew landing page:
Once you have created some homebrew that you're happy with, if you would like for others to be able to see and use your creation, you can submit the creation for Public Homebrew.
To do this, go view your monster/item/spell and click on the PUBLISH link at the top of the page. A confirmation dialog will appear:
Click the SUBMIT button.
Your creation is now in the Homebrew Moderation queue, where it will be reviewed by one of D&D Beyond's moderators, to ensure that it adheres to the Homebrew Content Rules & Guidelines.
Please, be patient and do not message moderators, asking them to review and authorise your homebrew. We will work through all homebrew submissions in order and either authorise or let you know if changes are needed to your creation to meet the rules & guidelines.