Joining a community CS2 retake server takes under a minute once the developer console is enabled.
1) In CS2 go to Settings → Game → Enable Developer Console → Yes. 2) Press the ~ key. 3) Type a connect command and press Enter.
For Tickrate Retakes #1 use: connect 138.201.131.228:27015 — for Retakes #2: connect 138.201.131.228:27016.
Prefer clicking? Open https://tkrate.com/cs2/retake and hit Join. That launches the steam://connect link for the selected server.
After you load in, type !guns to choose weapons. Check the leaderboard anytime at tkrate.com/leaderboard. Still stuck? Ask in Discord — invite linked from the site header.