In a non square room it took a while to decide what straight edge to start from 😀
A lot of measuring and marking to get a "centre" line, then choosing which corner should be on that line.
Tips: Dry run fitting the pieces together - you may find there is one way that works better/easier for you. A centre of the room line is not necessarily the correct thing to do as you may end up with tiny pieces to fit in at the edges. Lay out 10 to 20 "rows" but only two pieces wide (hope that makes sense) to start with, then line up that "patch" of planks on your marked line, and fix it in place (glue, or several screws around the edges that you'll later take out as you add more pieces).
HTH
To answer some other points above, I only glued the tiny pieces at the edges so they didn't move out of place. The windows face WSW so only get late afternoon sun. Even with LVT, the angle can wander a little, but I guess not as bad as wood parquet. And yes @Super_Paulie, the struggle was real 😀