Hello, I am getting ready to install my flooring, but I'm unsure whether to start in the living room or hallway.

First I'll try to describe the rooms as best as possible to help explain my concern....

The l/r is about 23x14. I have an adjacent hallway that is about 3' wide that runs parallel to the long (23') dimension of the living room, with a wall seperating the h/w and l/r. So imagine if I was to remove that wall, the entire area would be 23x17. I am running the flooring parallel to the long wall that divides the l/r and h/w.

So here is my concern... My first instinct would be to simply start the flooring in the l/r on the wall opposite the wall that seperates the l/r and h/w. However, if the starting wall and l/r- h/w dividing wall are not perfectly parallel to each other, then I fear that by the time I get to the hallway, the flooring might be slightly skewed. Now in a large room that is not perfectly square, I would imagine it would not be that obvious if it is "off" a little... but in a narrow hallway, I am afraid any variation of angle between the walls and the flooring planks would stand out and be much more noticeable.

Is my concern valid or am I over-thinking this?

With that said, if my assumption is correct, would it be smarter to maybe start on the hallway side of the dividing wall and work across the hallway, then use splines to reverse direction and work my way back into the l/r?

No, valid concern. I chalk out reference lines on the subfloor to see where the walls line up; if they're parallel or off. Typically, I start off an exterior wall as that is where the foundation was squared to. Interior walls can sometimes be off. Measure off the exterior wall in the lv/r over near the far wall, or even half way. transfer that measurement to the hallway. Or, chalk a straight line down the hallway and see if it is parallel to the living room chalk line. And here's a tip. You can "fugde" it a bit in the short run between the hallway and the lv/r to get it to look straight. BTW, don't sweat small differences like 1/4", those don't show in the overall appearence.

You can do it this way as well. Snapping reference lines will tell you which way to proceed.

thanks for the tips... I'll snap some lines to see where everything lines up.