After Oar's substitution, Utrecht conceded four goals to lose 4-0 and he admits it wasn't a pleasant game to be a part of.
"It wasn't the best game to make my first starting appearance," he told AAP.
"It is always good to get that first start out of the way ... even if it was not the ideal circumstances.
"It can only improve from here."
"It is a whole new world to the A-League, it is the other side of the world," he added.
"The whole mentality in the team is different and it will take a while to get used to it but it is good to be exposed to it."