Frozen upper window, numbering of rows and column selection

is there a way to make the “frozen window’s cells” non selectable when selecting a column ?

  • i’m reffering to the upper rows, one can set as fixed, through the “window” option

also, is there a way to make it so that numbering of rows starts after that fixed window ?
i used to make a column just for numbering, but it gets frustrating at times, when you look at it quickly