Basic Q's from a parent

[3dfxMM]

This is my first post here although I have been reading these forums for a while now. My son just graduated OSUT at Ft. Benning last Friday. Two days before he graduated he was informed that he was being switched from his 11B contract to an 18X contract. He had volunteered several weeks before but was assuming that it wasn't going to happen. He was, of course, thrilled to be told this news. He just started BAC yesterday. Since this was sprung on us rather suddenly at his Turning Blue ceremony, I have a few questions that he was not able to answer yet.

He is an E-2. I saw that recruits that come in with 18X contracts are promoted to E-3 after they graduate OSUT or BAC. Does this mean that he will likely be promoted soon?

Is he likely to get any leave between BAC and reporting to Ft. Bragg?

I am asking more for me than for him since he will be told all that he needs to know.