a few questions on guard

[SteveLord]

I was just wondering though is there any way to get your mos or ship date changed?

Possible, yes. Likelihood, unknown.

I also didnt really get told any of my other options or any of the differences between active or reserves or guard or anything

You didn't ask. You were right earlier, you rushed into the whole process! Perhaps the thought of being apart of an organization the next 8 years is a little overwhelming for you. I recommend you talk to a few people (to include our forums of course) so you can educate yourself a little more. You are not the first to go through something like this and you would not the first to go with it and maybe....end up enjoying it.