It is a win even with best play by the Rook player.
However doing it is a task that GM's have been known to falter.
I do not know of any set key set up's to force the King and Rook onto the back rank
but once the King is there you as the Queen player must watch for stalemate chances
as given in that blog.
Then it's down to ideas nicked from Philidor. Here Black to play.
Black has one move with his King. 1...Kh6 when 2.Qf8 pins the Rook but also
find the wins with 2.Qh8+ and Qe3+
That leaves seven sensible Black Rook moves 1..Rg4 1...Rg3 1..Rg2 1...Rg1 1..Rc7 1...Rb7 and 1..Ra7.
White wins in each case by Queen checking and forking the Rook or mating the King.
You have to go through each one. They are fairly easy once you have done two or
three of the Rook moves and patterns start to stick.
Mess about with that position you will pick up ideas.