Hi,

Please refer to the following links:

Dashboard:

1. https://www.cybrosys.com/blog/how-to-create-a-dashboard-in-odoo-17

2. https://www.odoo.com/documentation/18.0/developer/tutorials/discover_js_framework/02_build_a_dashboard.html

3. https://www.cybrosys.com/blog/how-to-create-a-custom-dashboard-in-odoo-15

Reports:

1. https://www.odoo.com/documentation/18.0/applications/finance/accounting/reporting/customize.html

2.  https://www.cybrosys.com/blog/how-to-create-a-custom-pdf-report-in-odoo-16

3. https://www.odoo.com/documentation/18.0/developer/howtos/create_reports.html

4. https://www.odoo.com/documentation/18.0/developer/tutorials/pdf_reports.html

5. https://www.cybrosys.com/blog/how-to-customize-existing-reports-in-odoo-17

Module for CRM Dashboard:

1. https://apps.odoo.com/apps/modules/18.0/crm_dashboard

You can find the latest version from v11 to v18.

Hope it helps.

There’s no official detailed ERD (Entity Relationship Diagram) published by Odoo, but you can explore the CRM structure through:

1. Odoo Studio
   • Visual way to inspect models, fields, and relations in the CRM module.
2. Technical > Models (Developer Mode)
   • Go to Settings > Technical > Models to view tables like crm.lead, crm.stage, res.partner, etc.
3. Odoo Documentation
   • Covers functional behavior more than database schema: https://www.odoo.com/documentation
4. Source Code
   • CRM models are located in:
     addons/crm/models/ — especially crm_lead.py, crm_stage.py.
5. Community ERDs on GitHub
   • Search “Odoo CRM ERD GitHub” to find community-created diagrams.

Hii,

Here is some link please check

https://youtu.be/gamkEnHvNGM?si=MXLpRQsxiYL_lwKr

for database schema you can goto "Setting" at the bottom of the column on the left under the "Technical" section you will see a "Database Structure" menu that might be useful as well.  

i hope it is usefull