The first planet available to explore in Star Wars Jedi Fallen Order is Bogano. You will reach this planet after completing the prologue. One of the locations available on this planet is the Abandoned Workshop.
On this page of our guide to Star Wars Jedi: Fallen Order you will find a detailed description of how to get to Abandoned Workshop.
To reach the Abandoned Workshop you must first get to the Subterranean Refuge. From there it's only a few steps away and you'll be in the described location.
In Subterranean Refuge you have to jump to the lower floor - as shown in the screen above.
At the bottom, you have to open a passage to get through. Use Force Push to move a metal board that will create a new bridge.
Move on until you get to Great Divide. From there, go straight ahead until you reach a location flooded with water.
You're almost there - all you need to do is climb up the overgrown wall and open the passage. This way you can get to the Abandoned Workshop.