To unlock this achievement you simply need to participate in Team Adventures until you reach level 5. You don't have to join a team or a club to unlock this.
To access this mode from the Pause Menu simply navigate to Team Adventure > Unranked Team Adventure
It will probably take you 10-15 games to reach level 5. You also get an extra 5,000 XP for winning, which really helps.
You can choose any of the three playlists (Racing, Games or Anything Goes), however your level is separate for each playlist, so once you pick one, stick with it until you reach level 5.
Personally I picked Anything Goes, you get more variety by participating in both Races & Games but the choice is completely based on preference.
Participation does matter, if you aren't contributing you will earn much less XP than if you were! Most of the game modes are straightforward but since this is an achievement solution I'll list some tips:
Freeroam Race
There is no checkpoints here, so look at the map before the race starts and just try to get a direct route to the finish, don't worry about following the roads or GPS at all.
Flag Rush
When defending the easiest way to deny points is camping the zone, or camping the spawn.
King
When you get slowed the idea is you tag in another person on your team. Many people don't seem to realise this.