Google Analytics support to maximise for a campaign

We're working with a big client and want to be able to track user journeys through our site and out to other links to learn how people are finding and signing up for our product. We have a Google Analytics account set up but i believe it's only tracking and providing us with the basic amount of info. We'd like to work out where people are coming from, what they click on within the site and then where they head off to. This will involve tracking some buttons in page. We're using WIX so it would be helpful if you could help us get analytics set up that work well with that platform

We'd need this to be set up asap, ideally within the first few days of next week (25th latest)