Hello Minimon,
If you are familiar with Microsoft Power Platform then you can try to link your application with Dataverse and Power Automate. Dataverse is a cloud-based data management solution that allows you to link your data and processes through workflow automation with Power Automate.
However, you can use only Power Automate as a web service to link your application or SQL with Outlook or Teams depending on the actions you want to produce in Teams or Outlook.
You won't need to spend a lot of time studying to be able to see the first results.