I can relate and know you'll be busy researching and absorbing an incredible amount of detail in a very short amount of time. It's not great news out there, but there are also some incredibly hopeful stories too.
From personal experience with my mom (58, diagnosed with stage 3 PC in Dec 2011), I wish we had gone with Folfirinox as the first line of treatment. Although it has many more side effects, it's definitely the more aggressive treatment and offers a better prognosis (about 30% chance of being effective vs Gemcitabine's 15-20%). Since my mom is young, fit and active, she would have been better posed to tolerate a harder treatment as neoadjuvant therapy in the hopes of getting to surgery.
We went with Gemcitabine, and the side effects were very mild and tolerable. Unfortunately, when combined with radiation, it had no effect and the tumor grew. That's not true for everyone, but we weren't one of the lucky ones. Surgery isn't an option now, but she's on Folfirinox (3 rounds) and doing well so far.
Other suggestions:
Reach out to Pancan. They have a lot of information, can help pull clinical trial details, and have available people to talk to whether you're the patient or caregiver.
Get consults. General oncologists are okay, but if you live in an area with access to a specialty center with oncologists that focus on pancreatic cancer, check them out. It's completely accepted to have second and even third opinions with this diagnosis and to have a specialist riding along throughout.
Ginger recipes. We're finding ginger helps a lot with the nausea from the Folfirinox, and the internet has been most helpful in a variety of recipes (everything from crystallized ginger from Trader Joe's to ginger tea to ground ginger in pumpkin muffins).
Get the hard stuff out of the way. Get the will taken care of, talk about funeral plans, etc. Hopefully you won't need any of that for a very long time, but getting all of it discussed ahead of time means a sort of peace of mind and ability to fully focus on treatment and recovery!
All the best to you and your family. My thoughts are with you!