Start Here: The Fundaments of Commodore 64 Programming in BASIC and 6502 Assembly Language: For real or emulated C64s: McGinnis, John: 9798837937644: Amazon.com: Books
A Commodore 64 Walkabout: V3 (Retrocomputing Walkabout Book 1) - Kindle edition by Mason, Robinson, Mason, Robinson. Children Kindle eBooks @ Amazon .com.