I think that finding a good book would be a GREAT help. Another way to learn some formulas would be to look up some of the formulas you already know in Excel and then click on the See Also link in the help file. You will be directed to other formulas that are similar and should be easier to understand. Another great way to learn formulas is to get your hands on as many spreadsheets as possible. Look at the formulas that are used and see if they make sense. Good luck!
just browse through various threads here in mr excel...that's the very best way...ask me. There's these cool guys here like Paddy, Laws10, andrew Poulsom, aliddin ayurek, and a great many others ( excuse my some of you great guys whose names are not here..i just could not remember )...but ther are really good.