Where Are Workbenches in Outer World's?

Once you have the first modification, get to the nearest workbench, which in this case is the workbench at the landing pad at Edgewater Town.

Can you put your gun down in outer worlds?

Press and hold the Square Button (PlayStation), or X Button (Xbox) to put away and holster your weapon.

What is tinkering outer?

Crafting in The Outer Worlds is called Tinkering and it's limited only to weapon and armor upgrades. You can't create new items in the game, but you can modify your equipment at the workbench (for example, by adding a scope or increasing the damage of specific item).