The Ireland U21 international made his first start for the Lions since joining on a season-long loan deal in the summer, and he reflected buoyantly on a winning start to life in south London.
He said, “It’s obviously a good start. To get my first minutes was obviously really important for me and I probably would have liked to have played a bit sooner.
“I had a little injury at the start of the season so to be involved yesterday in such a hard-fought win was something I was delighted with.
“They had a strong side out - Charlie Austin made his debut and scored, it was a tough one away from home where we had to work hard.
“That’s what Millwall is about when you talk about digging deep and grinding out results.”
Molumby, who turned 20 eight days ago, says that he’s relishing every moment at the Championship club so far.
“It’s been fantastic. I’m absolutely loving it even though I haven’t played too much, and the atmosphere of the club is great,” he continued.
“The people around me are brilliant and I’ve really enjoyed it. I live about five minutes from the training ground in Bromley, so that’s a good location and one where I feel settled.
“There’s a few familiar Irish lads in the changing room as well in Shaun Hutchinson, Alex Pearce and Aiden O’Brien.
“They’ve helped me to bed in and have all played for the senior side at international level, so are good players to learn from too. They’re great off the pitch too and have made sure I feel included away from the field.”
The Irishman was involved in the start of Graham Potter’s pre-season training at the start of July before picking up an injury, but he spoke about his drive and desire to now grasp the chance of regular senior football.
“This is a big opportunity for me this year and after the injury setbacks in recent times, I needed to get out and play senior football.
“I’m 20 now and need to get league games under my belt. I would have wanted to go out on loan earlier in my career, but now is definitely the right time for me to try and kick on and this is a big season for me.”
Elsewhere last night in the competition, Ben White was part of the Leeds United side that beat Salford City 3-0 in the televised game live on Sky Sports.
Jan Mlakar was successful from the penalty spot in a shootout win over Bristol City at Loftus Road, whilst Robert Sanchez and Rochdale beat Bolton Wanderers 5-2 to seal their place in round two – coming from behind twice in the match and notching four times in the second half.