Hi @emiliano, I’m not sure what framework you are using but here is some general guidance on creating a blog. For Shopify hosted sites you can easily create a blog with Builder using this guide . Or to create a blog with Builder and Next.js you can follow this guide and take a look at this example in Github to see how we set up our blog at Builder.io. To add categories and tags you can add custom fields to your blog article model.
Create a Blog in Builder using our Shopify Theme Studio
Create a Blog in Builder with Next.js
Next.js Blog Article Example
Using Custom Fields in Builder
As for using custom components, take a look at this guide to get started with registering and using them: