Time indeed passed much more slowly there than in reality, but even that had a limit.
Lin Sheng had found the techniques to use his holy powers, but what confounded him was the information that he had gotten. It categorized his current stage as a basic accumulative stage.
At this stage, there were no techniques to be used, as the seed of holy power had yet to give birth to a holy power that is flowing. That meant it was not usable and all he could do was wait.
Of course, if he was lucky, he could unleash his holy powers given time, but that was simply an unleashing of holy power after a period of accumulation, not some sort of ability or talent.
It was simply a matter of preparation.
A Level 3 paladin, aside from some boost to his body and strength through the holy power, he still would need to rely on the Ashen Seal to fight.
That was because, at that stage, the holy power was accumulating to strengthen his physical attributes.