I gave you examples earlier!
For a start, Alan Stubbs was a rookie manager with Hibs. They were one of Scotland's big 5, trying to get out a division that contained Hearts & Sevco!
Rangers appointed Souness, Walter Smith, Ally McCoist. Celtic appointed Lennon & Brady.
St. Mirren gave the job to Clunie, McFarlane, Alex Miller (with 2 months experience) & Fitzpatrick.
Outside of the Old Firm there have been...
Paul Lambert (Livingston), Tony Mowbray (Hibs), Billy Davies (Motherwell), Eric Black (Motherwell), John Collins (Hibs), Neil McCann (Dundee), Simon Stainrod (Dundee), Martin Canning (Hamilton), Lee McCulloch (Kilmarnock), Bobby Williamson (Kilmarnock), Gary Locke (Hearts), Gerry Britton & Derek Whyte (Partick Thistle), Craig Brewster (Inverness), Stuart Kettlewell & Steven Ferguson (Ross County), Billy Kirkwood (Dundee United), Gordon Chisholm (Dundee United), Peter Houston (Dundee United), Eddie May (Falkirk), Steven Pressley (Falkirk), Willie Miller (Aberdeen), Roy Aitken (Aberdeen), Ian Cathro (Hearts).
I make that 32. Is that enough?