How would you animate a character picking up an object for example, a gun or a bat?
Hi and welcome here
It is always hard to start from nothing.
Here is what I would suggest to you: record yourself doing the action !
Use your webcam or your smartphone to get a reference of the expected movements.
Once it is done, you can split the video in images and import them in Synfig as “background” layers and draw in other layers, above.
Another possibility is to do the same under Gimp or Krita, to create your character and rip it into piece you could the import and animate with bones as paper cut animation.