A first-half penalty from Dapo Mebude and a strike from Josh McPake was enough to see the Young Gers win 2-1 against Lowland League side Berwick Rangers at Shielfield Park.
Murty said: “It was a good test, we played some really really good stuff then we got a bit slack and got involved in stuff that we didn’t need to be involved in but it is a good lesson for our young players getting through a round in a competition that we have failed to get through the first round in in the last couple of years so they managed that very well.
“I keep saying to them if you do not take your chances it is going to come back and bite you in the backside and it did.
“Then it got a bit frantic for a little bit some of our play got a bit ratty and a bit erratic and we got involved with the referee when we didn’t really need to.
Dan Purves got a goal back for Berwick with 20 minutes to go, but Murty believes conceding the goal added to the players learning.
He said: “I think sometimes when you get a two-goal lead players, especially young players, can get a bit too comfortable and then think that they have to do something a little bit different rather than doing the things that get them success so once again a good lesson for them and there will be a good review when we go back in on Thursday.
“As long as it doesn’t put the game at risk it is a good thing for us to learn about.
“Once again it is a good learning bit for them, a good bit to teach them the game and how to manage the game and as long as it doesn’t put the game at risk there’s nothing necessarily too bad about conceding goals.
“They are down to 10 men but we could’ve been more patient with the ball but I don’t actually think we were ever in danger of losing the game but I would’ve liked us to have been more comfortable and be more clinical and get the rewards they deserved because some of our play was great.”