ABAP for BW

Hi,

I am finding it difficult to create update rules and start routines and understand the logic in BW due to my lack of knowledge in ABAP.If any of you have any materials with information specific to ABAP usage in BW Please send me a copy of it to [me_shilpa_k@yahoo.com]

The help is much sought out for. It would be appreciated and rewarded too

Thanks in advance

Shilpa