Question: Is there a solution that enables me to create entity relationship diagrams and heat maps, and also provides tutorials and explanations for new features?

If you're looking for a tool that lets you create both entity relationship diagrams and heat maps, ChartAI is worth a look. It's an information visualization framework that lets you create a broad range of visualizations, including ERDs and heat maps. It also has tutorials and explanations of new features on its YouTube channel to help you learn the ropes. ChartAI is relatively easy to use, so it's a good option for those without a lot of technical experience.

Another tool worth considering is EdrawMax, an online diagramming tool that supports more than 280 types of diagrams, including ERDs and heat maps. It's got a large collection of tools, AI-boosted diagramming and a cloud-based workspace for collaboration. EdrawMax has a library of templates and symbols so it can fit into your existing workflow, and you can export and share diagrams with others.

For something more interactive, Azimutt is a database explorer and analyzer that offers scalable ERDs. It's got features like linting, path finding between tables and collaboration tools. Azimutt supports many types of databases and lets you share diagrams securely, so it's a good option for managing and understanding database structures.