How do I start/ join a match?

Been trying for 20 minutes and looking at youtube videos, client in every video online looks outdated. I’ve never seen such a non user-friendly system to the point where I can’t figure out how to join a match for 20 minutes.

When I select csgo and click “play” it just opens 3 tabs that I can click on. “hubs” + “tournaments” + “teams”, nowhere does it say anything “Join a match”