If this is your first playthrough of the game and you're playing solo, you'll get this achievement once you finish the tutorial after the first scene.
If you played multiplayer on your first playthrough, you probably missed this like I did, so here's how to get it:
Step 1: At the main menu, select "Main Game," then press "Play."
Step 2: Create a new agent AND a new campaign. Once you deploy your new agent, a cutscene will trigger. After that, you will be thrown into the tutorial.
Step 3: Complete the tutorial and you will unlock the achievement and an avatar award.