"I have been raring to go for a couple of months but I haven't got in there so it has been a bit frustrating at the minute, I am desperate to play," he says.
"People keep talking about the lads playing with a little bit of fear but there are players like myself who are desperate to get in the side who wouldn't be playing with any fear.
"I have had a few workouts and all I can keep doing is my own bit - so I am just waiting for the opportunity."
Of the relegation battle ahead he says: "It is going to be difficult but we have got to start winning games; I am willing to do my best for the club and I can only do that if I get the chance.
"I had a good game in the reserves and hopefully it gives Glenn a nudge."
As for a Sunday newspaper story at the weekend claiming he wanted to return to Sunderland, he says dismissively: "It is a load of c**p. I don't even know where they have got it from so it is not even worth commenting on, really."
Don, called up for Scotland's friendly against the Republic of Ireland next week - he could play alongside Christian Dailly and against Gary Breen - scored from just inside the opposition half in the reserve game on Tuesday, before missing a penalty.
And his modest assessment of that goal?
"I just had a shot from the halfway line - it's not that difficult, mate!
"It was just instinct, something you do in training."
And just the sort of thing he would like to repeat in the Premiership...