You don't need to remove anything other than the windshield washer fluid bottle to get access. The starter is secured to the bell housing by three bolts, all of which are accessible from above. The center bolt is a shoulder bolt that is installed in the opposite direction of the other two.
Disconnect the battery, then disconnect the wires from the starter solenoid. You can do this by reaching around the front of the plenum (you may want to remove the coolant overflow bottle to ease access, but it isn't absolutely necessary). There are a couple of wires with ring connectors on the front of the solenoid. Unscrew the nut (13mm?), and the wires will come off. Then there is a connector to a blade terminal on the solenoid.
After the wires are disconnected, just remove the three bolts holding the starter in place and pull the starter forward and out around the front of the plenum. The job is a little tougher is your car has AC.
'85 Spider Veloce
'17 Giulia Ti Sport