Here's a very detailed walkthrough taking you step-by-step through a base offense that you can use for all different age groups. If you're new to coaching basketball, this is a great video for you!
Gotta have at least 1 Big that can make 3-pointers, positioned at WEAKSIDE ELBOW to pop outside the 3-point line after the 1st Pass for ball reversal to the other side of the court.