Excel is a superb program, but it is not intuitive ! It has one thing going for it - 'Help' in Excel works. In general, if you ask a question, you will get an answer that is relevant.
But you sound like you need a more general introduction, without getting ridiculously technical or complex. I can recommend either of two books - the Idiots Guide to Excel or Excel for Dummies. If you don't want to buy them , your local library may have a copy. Both of these series are well written, clear, spell out at the beginning the assumptions they make about your pre-existing knowledge, and include an element of humour. They will not make you 'expert' - that is not their intention - but either of them will give you a good grounding in an excellent application.