What issues are you having connecting data? If you want to track trends then you should create your own database, capture data and populate your database. What is the source of the data that you need? For websites you can use the RPA functionality of Power Automate desktop to capture the data.
You need to examine all your sources of data in order to build your data model. When your data model is built you will have a better understanding of how to create your dashboard and reports and insight generation.