Spurs dismissed Mourinho on Monday after 17 months in charge and chairman Daniel Levy has handed the reigns to former player Mason, 29, on a caretaker basis until the end of the season.
The 29-year-old admitted he has "exchanged a few messages" with Mauricio Pochettino's coaching team and reflected on a "crazy" 24 hours, insisting: "Anything can happen and you just have to be prepared and ready for what football can throw at you at times.
"It's crazy. It's football. I've had it as a player. Obviously I've had the experience of having to retire in this game."
He also stated that he was not focusing on his long-term prospects in the hotseat, when asked about whether he wants the job on a permanent basis.
"Look it's a bit of cliche but I only knew I was taking training yesterday. All of my focus is on the game tomorrow and then the weekend," he said.
"I think it's no secret that I love this football club. To spend 20 years of my 29 here and it's a big part of me.
"We [Mason and Daniel Levy] had a very long chat [yesterday]. Once the news broke I was in the building. We had a conversation. I took training, we had another conversation and he asked me if I wanted it."