You're looking for
http://smilebasic.com/en/beginner
It's the official SmileBASIC coding tutorial which teaches you everything. Keep in mind, learning to program from nothing is a lot, A LOT of work, and most people do not make it past the beginner level. But like every computer scientist says, once you learn one programming language, you learn every programming language.
3そうだね プレイ済み