How to detect a load bearing wall?
Bearing wall: probably not.
Structural wall: possibly.
I suspect the floor joists run parallel to the wall you want to remove. If no overhead loads bear on this wall, then it’s not a load bearing wall.
However, the wall could support (brace) the exterior wall.
If the wall does not have plywood on it, it probably is not a structural wall. The Code requires the width of a building to be a certain percentage of the length. If it exceeds (less than 1:4, I think) that amount, an interior wall (bracing) be added for shear.