Newbie - is basic tracking made automatically when installing?

Hi! Do I have to setup anything after activating the Wordpress plugin?
On the Get Started page it says
" 1. Tracking is enabled

[Click here to configure your tracking code.]"

Can I know how many visitors my website is having now? Or must I configure tags on each page or something? I installed a “header, footer and post injections” plugin, so I’m ready to make any modification of that kind. As I said, this is the first time I’m tracking a website. So please guide me step by step :grimacing: