How To Get Past Darkfall Cave?

I am at the quest "Retrieve Auriel's Bow". I met the last of the Snow Elfs Knight-Paladin Gelebor. He tasked me to go through this portal to get through the Darkfall cave to the Forgotten Vale.

My local map says I am still in the cave.

And it is really dark, I keep retracing my footsteps and keep falling into the waterfall all the time all over. I have my torch lit and my candlelight spell active all throughout.

The guides on the Internet (UESP) keep saying follow the pink flowers. They lower themselves as soon as you are in proximity, and rise again.

I am really stuck here people. How to get through this cave and onto the next wayshrine?