The Learning Curve

At most jobs I have had, I have caught on fairly quickly. This new job is proving more difficult than I had anticipated. There is a high learning curve. I'm doing things I've never done before. There are lots of different accounts to deal with and I have to learn how to enter things into ledgers and to process purchase orders. I'm slowly getting it. But I feel like I have to ask a lot of questions. And I worry that I am not getting it fast enough. I will probably start learning cataloging soon so I want to be sure that I have receiving and invoicing pretty well down. It is frustrating for me to go from being the person who knows everything (like at my last job where I had five years of accumulated knowledge) to being the person who knows nothing and has to ask tons of questions.