I, personally, would recommend Google Analytics. They are the best at gathering information on customers, web traffic, and user behavior.
They have a very good online course which I'll link here for you. https://analytics.google.com/analytics/academy/
I've been using google analytics for a while and I really enjoy it!
If you need any further instruction, other ways to gather user data, or would like someone in person to walk you through how to get it set up feel free to reach out to me.

Best of luck!!!
- Kyle