You should modify the path for open a new template.
See picture below, you have to create a command button in excel, assign the macro below, and try.
Sub Macro_Cad()
Dim acadApp As Object
'Check if AutoCAD is open.
' On Error Resume Next
Set acadApp = GetObject(, "AutoCAD.Application")
On Error GoTo 0
'If AutoCAD is not opened create a new instance and make it visible.
If acadApp Is Nothing Then
Set acadApp = CreateObject("AutoCAD.Application")
acadApp.Visible = True
End If
'Check if there is an active drawing.
On Error Resume Next
Set acadDoc = acadApp.ActiveDocument
'No active drawing found. Create a new one.
If acadDoc Is Nothing Then
Set acadDoc = acadApp.Documents.Add("C:\Users\IO\AppData\Local\Autodesk\AutoCAD Mechanical 2021\R24.0\enu\Template\acad.dwt")
acadApp.Visible = True
End If
acadApp.Visible = True
MyScreenPoint = acadDoc.Utility.GetPoint(, "Select Insertion Point: ")
Range("E3").Value = MyScreenPoint(0)
Range("F3").Value = MyScreenPoint(1)
Range("G3").Value = MyScreenPoint(2)
End Sub
