2002 Boxster 986, no power, please help

[MMadrid_986]

Hello everyone! My dad has had this Boxster for a good couple of years and suddenly after having taken it out on a drive, it died (?). He has given me it in hopes that I may find a solution and fix it.

I'm new to fixing cars but have great memories with this one and would like to try.

Currently, when I turn the key NOTHING happens. no lights on the dash or anything.

I checked the battery and it's new and working fine. From looking at other posts, I think it may be the alternator, immobilizer, or maybe the ignition barrel but I have no clue, any advice helps!