If you’re anywhere around the Southeast the guys at Gulf Coast Technology Center (a regional task force that doesn’t want to be called a task force) has fantastic practical training. We currently have 6 licensed drone operators at my agency. We used a combination of Gold Seal Ground School for test prep and free online resources. We also have an account with Drone U which is a good resource for operations not really LE specific. GCTC classes are leveled 1-5 or 6 starting at basic controls and flight, moving into covert surveillance, mapping, over water operations and counter drone operations. Best part is it’s free as they’re govt funded. They travel around a good bit too.