Yes so assuming this is the same plane up and down you should arrive on gate 3. When you exit on to the corridor you can either go around the corner (where you see the lounge behind the glass) and take a seat for a bit. The door to the gate 3 should open around 30 minutes before departure, so you just go back around the corner for that.

Alternatively you can use the lounge if you have access. On exiting to the corridor turn right and there is a one way door which doesn’t activate from your side. It usually isn’t long until someone walks past or comes through from the other side, at which point you can nip thro and the lounge is about 20m straight ahead on your left. To get back to the gate just head back to the one way door and turn right.