The Boys in Green continue to prepare for the Uefa under-19 Championships qualification with two friendlies against Slovenia in Waterford
The Young Boys in Green suffered two consecutive defeats against Norway in their previous fixtures at the beginning of August and they continue their preparation for the qualification stage with two games against Slovenia.
"The last two games was a new group coming together. We're looking for them to do things and they may be used to different ways of doing things but we're looking to get a good group together on and off the pitch," said Doolin.
"We had these players in Switzerland last year and knew that we had some things to work on. After the Norway friendlies we could see that we still have a bit of work to do."
However, Doolin believes that the forthcoming games present an opportunity to blend a squad together ahead of the qualification stage, which sees Ireland pitted against Azerbaijan, Sweden and Bosnia-Herzegovina.
"Slovenia gives us an opportunity to look at some new faces and work with some of the players we've done a bit with. We're trying to get a squad together for the first phase in Uefa.
"It's difficult at this stage when you're starting over again. I think it'll be a tough first phase for us this year," he added.
"We're looking forward to playing in Waterford on a great pitch. Slovenia have given us good games in the past but the main thing for us is to improve and be ready for our first game in the qualifiers against Azerbaijan," concluded Doolin.
Republic of Ireland U19s will take on Slovenia at the Regional Sports Centre in Waterford on Tuesday September 3 and Thursday September 5.
Republic of Ireland under-19 squad
Eric Grimes (Leeds United) Shane Fagan (Shamrock Rovers) Colm Crowe (UCD) Craig Donnellan (Cork City) Alan Browne (Cork City) Bobby Moseley (Birmingham City) Noe Baba (Fulham) Dean O'Halloran (Fulham) Adam Wixted (Derby County) Sean Long (Reading) Liam Kelly (Reading) Kyle McFadden (Norwich City) Sam Byrne (Manchester Utd) Alex O'Hanlon (Liverpool) Bradley Lewis (Aston Villa) Kevin Toner (Aston Villa) Steven McCarthy (Sunderland) Alan O'Sullivan (Aberdeen)