I just think that blackhatwannabe, should first research if the Mir is the right place for him.
If you are only coming for the Summer, it’s not the place to go. If you are not from an yeshiva, that feeds its bochorim into the Mir, you will not fit in, and will have little socially there. e.g. Bochorim that learned in yeshivas that feed only to Brisk or R’ Kaplan, etc. will not find their place in the Mir.
Although you can come before applying, not everyone gets accepted. You have to have letters of recommendation from your previous yeshivas, and go through a Farher.
And once admitted, good luck finding a place to sit. The bulletin boards there always have ads for empty beds in diras.
Also, be aware that the Mir is lately enforcing that bochorim even in private diras, (not in the dorm) do not have laptops, or internet connections.