What should I do first?

Two things get you the most value quickly:

• Connect a source (Strava is the easiest start) so your activities flow in. See Connectors.
• Log a daily check-in so the Readiness and injury flag views have something to work with. See Daily check-in.

It is a website, so there is nothing to install. It works in any modern browser on desktop or phone (see On your phone).