The Parkhead club's bid to bring in Tony Mowbray continues to be held up by West Brom's demand for £2million in compensation.
McGinn, though, is used to waiting, having yet to make his first-team debut for Celtic since signing from Derry City in January.
A second-half appearance for Northern Ireland in a friendly defeat in Italy last week whetted the appetite of the 21-year-old who is mentally gearing up for a concerted attempt to establish himself at Parkhead next season.
McGinn said that he is relishing the clean slate that the whole Hoops squad will have when they return to pre-season training at the beginning of July to meet their new boss.
"I assume there will be a new manager in place by the time I come back," he said.
"It's the board's decision but whoever it is, the players will all be starting from scratch.
"We are meant to report back for training on July 1 but maybe the new manager will change that.
"However, whenever we get back I will hope to make an impression on him.
"We are all out to prove ourselves, especially myself because I came to Celtic late last season.
"It was difficult for me when I first arrived because I had lost six or seven weeks of fitness beforehand.
"So I am looking forward to getting in a full pre-season and I want to be 100% fit to give myself every chance.
"Hopefully, I will get some of the pre-season games and then get some games in the SPL.
"If I do get the opportunity it will be down to me to impress and the rest of the boys will have to do the same."
The former Dungannon Swifts winger regrets not having the chance to play under Gordon Strachan, the man who brought him over from Ireland.
"It was disappointing to see Gordon Strachan leave the club," he said.
"He served Celtic well and he won three leagues in four years.
"It was very enjoyable when I trained under him with the first team but I'm sure training will be equally enjoyable whoever comes in."
McGinn's first chance to shine in front of the home support next season could come when Celtic welcome Sunderland to Parkhead on August 1 for a friendly.
The Black Cats will travel to Glasgow also with a new manager, Steve Bruce having taken over at the Stadium of Light.
It is a season-ticket match for Celtic supporters and it will be the first chance for fans to see the team at home and under new management ahead of the 2009/10 SPL season.