Your amplitude is from t=0 to t=1 s but the time period of the step is only 0.01 s so it completes just 1% of the desired movement.
Your setup is partially different than in the tutorial. Why are you using shells instead of plane strain elements ?
Keep in mind that such snap-fit analyses are extremely problematic to converge and obtain good results in CalculiX due to tricky contact conditions. My case was discussed here: Snap-fit contact snagging problem - CalculiX (official versions are on www.calculix.de, the official GitHub repository is at https://github.com/Dhondtguido/CalculiX).
You can also find similar (and other) tips for a different snap-fit case here: Insertion and withdrawal force calculation with plastic deformation