If you can’t get flashback idea to work, here’s an idea for a non-flashback way to cut it.

So you’re on the wide shot of Rey’s AT-AT home, and then it dissolves into a night version of that same shot with some nighttime ambience. The ambience continues into the next shot, which can be the opening shot of the star destroyer passing in front of the moon, movie continues.

Then when you cut back to Rey, you could cut together a very quick montage of her going through her daily routine again. Shot of Rey speeding toward Niima Outpost (maybe use shot from first teaser), shot of Unkar slamming down another quarter portion, an altered shot of Rey scratching another day on her wall, her eating outside (or maybe just her sitting quietly with the helmet on). This is when she hears BB-8. No nighttime scene here, and then you cut back to wherever the First Order plot is at this point.