sorting one column into two

Here is a simple solution directly in M. "SourceTable" is your source, which I have given a column name "Column1"

Creating the List called CharList is a little awkward because M does not have a direct way of specifying that a type conversion is *not* valid, so there is some conditional logic to evaluate true to false and error to true (if that makes any sense 🙂 

let
Source = SourceTable,
ValsList = Source[Column1], // Create a list made of the column containing the data
NumeberList = List.Select(ValsList, each try Number.FromText(Text.At(_, 0)) is number otherwise false), // make a list based on the first list, made up of values that start with a number
CharList = List.Select(ValsList, each if try Number.FromText(Text.At(_, 0)) is number otherwise false then false else true), //make a list based on the first list, made up of values that *do not* start with a number
MyTable = Table.FromColumns({NumeberList,CharList}) // make a new table of the two lists

in
MyTable