Don’t expect an official reply from DT as they suggest against self installs, ESPECIALLY when you are only 13, but they will make sure you don’t do anything “wrong”.
We the community will do our best to provide you with the information you need.
One thing I didn’t see you mention was, lifting the skin (tenting), if you are doing this on your own, you will likely need a tool to help you, or better yet a person (they may or may not also be a “tool” 
)
and better again, a professional.
Since you are going down this track, I would suggest a few tweaks.
My opinion is you shouldn’t really need pain “meds” but if you choose to, do the ice FIRST (potential bacteria) THEN you alcohol wipe (let it dry)
The markings on you hand, are they the edge of bone locations? ideally you would want a minimum of 3mm from the bone, but be prepared for your implant to move. Therefore get and take some prenatals prior to and after installation, also you may want to consider the corral method post installation. (matches /toothpicks and tightly taped to “fence in” your implant).
Have you done some research on installation, I put together a couple of links that should give you some pointers for a self install in written and video form.
go to the
section in the