Interview is the last thing you want, because I foresee it being a stokes interview. You'd be separated and grilled for some time with different questions about you, your spouse, marriage and other things. If some answers won't match, officer may accuse you of fraud. Or scare US citizen spouse into withdrawing their support of your I-751.
The living arrangement, again, may raise some brows at USCIS.
Do you at least have matching state IDs / DLs with same address?
Do you have Costco / Sam's Club membership listing both names?
Amazon household account?
Shared phone plan?
Letters from friends and family to both of you showing current address?
You really need to think hard how to prove the marriage. The worst case, you may eventually lose GC if you can't provide enough proof of bonafide marriage