I’m going from memory: You will need to remove the trunk liner fasteners on the drivers side of the trunk. Maybe six or so fasteners that can be removed by prying with a flat blade screwdriver on the fastener centerpin first to pull it back a quarter inch and then prying on the lower lip of the fastener to pop it out. Then pull the liner back.
Using a good flashlight, shine your beam back in there and you’ll spot the vertical reservoir tank with markings showing max/min levels. Just see what it looks like. I’m hoping that it isn’t low.

You ought to try Pizzaguy’s resyncing procedure, too. With the engine running, manually lower the top and then raise it again three times. Perform the lowering and raising three times fully from start to finish with the engine running. Maybe that will resync the system. However, if your fluid is low in the reservoir, resyncing won’t help that.

Post #31 has some good photos. This is from the sticky thread at: Rebuilding hydraulic system
Here are a couple of photos from that post to get you started: