1st deployment! Job etiquette advice needed!

Got word today(!) that I’m leaving for 6 months. Woo!

I just started a new job/career on Feb. 3 and have been on orders for the since Feb 27. I haven’t had a full month with this new company, and I’m about to leave out within 4 weeks. Do I-

Tell my employer ASAP when I’m in on Monday? Leave my orders on my desk the day before and dip- guaranteeing no funny business around USERA?

Follow up, is there anything allowing me unpaid time off to spend time with family before I depart?

I’m so nervous about not setting my family up for success before I leave, but excited to finally utilize my career training.

Aim High!