In two-dimensional XLOOKUP formulas, it doesn't matter which way around the XLOOKUPs go. In this example, the ID lookup is first in the formula, and the column header lookup is nested. If these were ...

When you use the click-Shift-click combination, the first cell you select remains active. To activate a different cell in the same row of the selection, press Tab and Shift+Tab. To move up and down ...