How do I add a weapon/object to my character?

I’ve only just started unity (yesterday) and as yesterday was star wars day I thought I’d try to make a star wars game. I’m starting slow, I haven’t put in m own character or anything yet but I’ve deleted the wrench the construction worker had, imported a lightsaber from sketchup warehouse and now how do I put it in the worker’s hand? Thanks

Create an empty gameobject, move it as a child of your model. Position it to where the lightsaber would be held in the hand. Attach the lightsabre as a child of this empty object, and rotate it so it looks correct. If you can drill down to a specific hand object and put the empty object under that, even better.