The former Republic of Ireland and Manchester United captain has been out of the game since being sacked by the Championship club in January.
Keane, who spent less than two seasons in charge at Portman Road, said: “My mistake was that I agreed to take the job before meeting the chief executive. That’s a vital role when you’re working with somebody so closely. I won’t be doing that again. Looking back now, Ipswich maybe wasn’t the right club for me.’’
The Corkman seems keen to give management another go at some point in the future but is in no rush to do so.
“I’m enjoying my time off. I think I have to step back now and see what’s around the corner. If I’m out of the game for six months or six years, so be it,’’ he told Cork’s Life FM.
“I’m sure there’s a club out there who might give me an opportunity but if it doesn’t come, I’ve got a good life, I’ve got a bit of freedom at the moment and I’m enjoying that.
“If I was to go back into it, as usual I’ll want to get to the very top and hopefully I’ll learn from my mistakes, particularly at Ipswich. I think I could potentially be a good manager but potential is one thing, going out and doing it is another thing.”
However, Keane appeared to rule out the prospect of a move into international management, adding: “I have to say it’s probably the hardest job out there, particularly when you only have one or two days to prepare.
“People probably don’t appreciate how difficult it must be for a manager to be sitting in a hotel on a Sunday night, waiting for players to come in and see who’s injured.
“My heart goes out to international managers because it’s a very difficult job. It’s probably more suited to a more experienced manager, someone like (Giovanni) Trapattoni.”
Meanwhile Ipswich manager Paul Jewell has revealed that Irish keeper Brian Murphy has turned down his new contract at Portman Road, while midfielder Colin Healy has accepted a new one-year deal with the Tractor Boys.
Jewell said: “Brian’s refused his contract, he’s left the club and we wish him well. Colin Healy’s accepted a year’s contract.”
Murphy joined Ipswich on a free transfer from Bohemians in January 2010.