I'm having a horrendously hard time keeping pace with my new position army job
What is tough about this position in particular?
There's a lot of new things that I have to do and learn besides the marriage issues,
It's understandable that you would have a bit of a learning curve to getting a new position. As long as you are trying your best and applying yourself that's all anyone can ask.
I don't have the slightest clue what is going on.
The more you work there the easier the job will get for you most likely. Do not be afraid to ask questions and observe what others are doing to get a better idea!