17 E reclass school coming up. Does anyone have any info on how the school is or anything on this?

You need to get yourself a SIPR token before school starts

I'm a little late to this but the course right now is 29 weeks long. Although it is a long AIT, It is separated in different MODS. Mod Alpha is the introduction and brief, Mod Bravo is Mathmatics, Mod Charlie is physics, Mod Delta is Bet Labs where you learn more about circuits and cables, Mod Echo was more based on history of the army and how our job comes in handy. Mod Foxtrot has 3 different parts. You learn python coding and the SDR's, Mod Gulf is more based around briefs and what equipment you use, Mod Hotel is more in depth of your MOS and actually using the equipment in the field, and MOD India is preparation of the FTX and the execution of it.

I'd start with the older conversations on RP regarding the class and go from there.
https://www.rallypoint.com/answers/how-can-i-best-prepare-for-the-17e-course