Just like any pet, no reptile will immediately take to being handled.
Reptiles will take time to adapt to their new home, so wait to begin handling for a week or more until they are fully settled in. While this is happening spend some time around the vivarium so they are used to your presence, but don’t be intrusive.
Once your reptile has settled in, you can place your hand into the vivarium and start interacting with your reptile. Allow them to leave the interaction if they want, and limit the handling to short periods at a time. Slowly build up your handling within the vivarium before you attempt to handle them outside of their usual environment.