Advise you read as much as possible about the process and how to develop the narrative and evidence related to the hardship. Prove both sides why you cannot live there without the spouse and why you cannot live in their country and why separation is extreme hardship ..not just the regular hardship anyone in separate living situations endures. The starting point is the government has rules, they universally enforce them on all of us so what hardship or unique circumstance arises from your particular case and what makes that extreme......(Google hake hardship scale, not the same waiver type but the concept of developing the case is the same in terms of what you are proving in the hardship case)
the evidence gathering will be largely your job but partner with a great attorney who specializes in
waivers to assemble , review , advise and slap a cover letter on that package for you.