The following references provide you with basic common knowledge on grant writing. While they don’t replace a book, a course, let alone speaking to an experienced scientist about your application, they at least give you a starting point:
Ten Simple Rules for Getting GrantsThe Art of Grantsmanship by Jacob KraicerA Fellowship Primer (HFSP) by Guntram BauerPockets of Plenty – Non-government Funds for Young Scientists by Leslie KnowltonTen Simple Rules for Aspiring Scientists in a Low-Income Country
Have fun reading!
Literature on Grant Writing