Cursor placement question

Apologies if this has been answered.  It's a bit of a weird question.

Is there a way to move the CURSOR between cells so that the cursor ITSELF is active and can be arrowed back and forth once it reaches its new cell?

I am not asking how to move between cells.  I am trying to work on a spreadsheet that already has data in it.  Data I don't want to overwrite, but want to move to specific text within each cell, without having to click five thousand times (okay, exaggeration based on annoyance :D ) to get to the spot in the cell I want to edit.

See below for an example of cells I'm working on.

I just need to go from cell to cell and change one or two characters in each cell.  Most of the data within each cell stays the same, usually only a few characters change, so it would be nice if there were a way to do this more quickly without having to clickety click click, or re-writing the entire cell contents.

It would be VERY helpful if there were a way to place the cursor at the exact spot I need with one click or by arrowing down the cells (that would be heaven).  Again, WITHOUT the several clicks and repositioning it normally takes.

Thanks in advance!