Newbie At Elden Ring Explores: War-Dead Catacombs

I was just gonna post the Boss Battle, but i've decided to post the entire exploration inside the War-Dead Catacombs.
Let's see how a Newbie handles it.
#ELDENRING
0:00 - Making my way
0:30 - Entering the Catacombs
6:00 - Tactical Retreat
6:55 - I'm a Chair now (Mimic's Veil)
8:47 - Panik...
10:30 - Progress
14:00 - Stone Imp thingies.
15:50 - Pull the Lever
16:50 - Stone Imp thingies (Again)
19:12 - Boss Battle (Failed)
21:00 - Boss Battle (Victory)