Hey Taurus, First off, take a deep breath and put the wrenches down—you absolutely do not need to pull that orange valve cover off. This is actually a super common mistake on these trucks and it takes about 2 minutes to fix.
I can see exactly what happened from your pictures. By "fell inward," it looks like your translation app means the tube unlocked and tilted backward into the cowl.
That long black plastic oil filler tube isn't permanently attached to the engine. It's just an extension tube that locks into the orange valve cover the exact same way a normal oil cap does—with a simple quarter-turn.
When you were trying to unscrew the oil cap (turning it to the left), the cap was stuck so tight that the entire black filler tube rotated to the left instead. That unlocked the tube from the valve cover, causing the whole assembly to tilt backward. Now the top cap is wedged tight underneath the plastic wiper cowl, and that triangular support fin at the bottom of the tube is physically trapped behind the thick wiring harness.
That is why it won't turn to the left anymore—it's physically wedged against the harness.
To get it out, stop trying to twist the cap. Look at the base of the tube where it goes into the valve cover (like in your 3rd picture). You will see that thick wiring harness running right next to it. Gently pull or push that wiring harness out of the way so the bottom of the plastic tube has clearance to spin.
Once the harness is out of the way, grab the thick black tube by the base and tilt it back toward the front of the truck to un-wedge the cap from the plastic cowl. Then finish twisting the entire black tube assembly to the left, and it will pull straight up and out of the valve cover.
Once you have the whole tube assembly completely off the truck, you can easily use both hands (or a rag and some pliers) to unscrew that stuck cap on your workbench. Then just push the tube back into the valve cover hole, give it a firm twist to the right to lock it back in, and you're good to go!