VBA to highlight range and format as a table

How to fix this VBA macro so it would highlight a range like A1 to the last row of column N and then format it as a table.
The number of rows will always vary, so I can’t name specific row number but I also don’t want more rows than required so I just want it to go to the last row in column N that has data in a cell.

Sub MakeTable()
    Dim tbl As ListObject
    Dim rng As Range

    Set rng = Range("A1:A" & LastRowColumnN)
    Set tbl = ActiveSheet.ListObjects.Add(xlSrcRange, rng, , xlYes)
    tbl.TableStyle = "TableStyleMedium15"
End Sub

I’ve tried the following, but I know nothing about VBA. I just found a similar one online and attempted to modify it for my needs, but I get a runtime error.