Syntax to call a specific workbook and specific worksheet using VBA?

Sub main0()
    Dim wb As Excel.Application
    Dim ws As Worksheet

    Set wb = GetObject(, "excel.application")
    Set ws = Worksheets("blue")
    
    'wb.Visible = True
    'ws.Activate
    'Range("A1").Select

    wb.ws.rng.Select
End Sub

Is it possible in VBA to combine the 3 lines

    'wb.Visible = True
    'ws.Activate
    'Range("A1").Select

into the following line?

    wb.ws.rng.Select

Basically this is to simplify the room the code takes up. Any help is appreciated.