Learning is always hard. Some things come more naturally to us than others but why should you expect to be an expert or even good at something new. Other people don't expect it of you. We should expect it and adjust our thinking accordingly. For some reason, if I am not automatically good at everything the first time I feel stupid too so I am joining you in saying this. When and how did we become that way? They didn't hire you for your computer skills anyway, they hired you for the skills that you are wonderful at. They will give you time to get competent in the new system. There may be a learning curve but you are an intelligent woman, you will be able to get it eventually. Spend your energy learning instead of shaming. You are a wonderful human being, but human none the less. Try to let both those sides of you shine. No one would like you if you were perfect at everything anyway.