VBA
Sub open_doc_word()
'Reference to Microsoft Word Object Library
Dim myApp As Word.Application
Dim myDoc As Word.Document
Dim myFile As String
Dim myParagraph As Word.Paragraph
Dim myTable As Word.Table
'file to be opened
myFile = ThisWorkbook.Path & "\test.docx"
Set myApp = CreateObject("Word.Application")
Set myDoc = myApp.Documents.Open(myFile)
myApp.Visible = True
Set myParagraph = myDoc.Content.Paragraphs.Add(myDoc.Bookmarks("\StartOfDoc").Range)
'https://learn.microsoft.com/en-us/office/vba/word/concepts/miscellaneous/predefined-bookmarks
'add some text
myParagraph.Range.Text = "Some text..."
'insert a table
Set myTable = myDoc.Tables.Add(myDoc.Bookmarks("\EndOfDoc").Range, 2, 2) '2 rows and 32 columns
myTable.Range.ParagraphFormat.SpaceAfter = 0
myTable.Range.ParagraphFormat.SpaceBefore = 0
myTable.Borders.Enable = True
myTable.Cell(1, 1).Range.Text = "Something..."
myTable.Cell(1, 2).Range.Text = "Something else..."
myTable.Columns(1).Width = myApp.CentimetersToPoints(5)
myTable.Columns(2).Width = myApp.CentimetersToPoints(10)
'save with new name
myDoc.SaveAs2 Filename:=myFileName & "new_doc.docx", FileFormat:=wdFormatXMLDocument, AddtoRecentFiles:=False
End Sub