The win lifted the hosts out of the relegation zone and at the same time kept Trinity looking over their shoulders with just eight points separating them from third-from-bottom Brackley Town.
But Roma took heart from the reaction of his players to conceding early on.
He said: “We had a lapse of concentration about three minutes in and it’s cost us dearly.
“But in fairness to the lads they’ve reacted well and we created some good chances in the first-half and had a couple of penalty appeals turned down too.
“Nathan Jarman and Craig Reid both had good efforts go close and although we needed a good penalty save from Jan Budtz to keep the deficit at 1-0, I was pleased overall with how we played so am not too downbeat.”
Roma has one win and one defeat from his time as manager so far following the departure of Steve Housham earlier this month.
And the 30-year-old says he has been pleased with how his players have responded to his tutelage.
He said: “The lads have been brilliant and really bought in to what we’ve been doing in training.
“We were all disappointed when Housh left but the reaction has been good.
“I’m enjoying the role although it’s obviously a bit strange given I’m so used to playing, but I’m taking each game at a time and it’s a learning curve every day.”
Trinity are on the road again on Saturday as they visit Stalybridge Celtic, who sit just below Trinity in the table.
One of Roma’s former clubs, Alfreton Town, then visit Northolme on Easter Monday.