This story seems to have an interesting start, though giving it life for its transformation and world traveling plot is something to keep in mind.

Alright, first person requires balance in description as the perspective is really good at the internal characterization. Thoughts, feelings, and how things are like for Dan are how the audience should see the world and areas you can expand on.

You need to show through Dan the description of things and not just tell them through Dan. You have a lot of I do this and that, but think about how to break it down and make the world a living place and Dan a living character.

This may allow people to feel more with Dan later.
Logic is also important and how we shape a story can have many issues in character and setting
Dan is 17 and acts this way when he is asked to take out the trash (a simple task)? He is at the end of puberty. This is a steep character flaw and lessens the audience’s relationship to him, but there can be a lot there if the flaw is kept and expanded on.
Why are cops in the woods at an abandoned stone wall?
The blackout transition could be handled better as well.

Work more on the internal character a strength of otherworld and transformation stories. Dan should be freaking out quite a bit or have some interesting traits if he does not.

Still, this can go interesting places, good luck.

Thank you for the feedback you bring up some really good points that I will try to work on in the future.