Make sure your dog knows the sit command before you start teaching them to sit anywhere.
Start by practicing the sit command in a quiet, distraction-free environment. Once your dog is consistently sitting on command in that environment, you can start practicing in more distracting environments.
Reward your dog with treats and praise when they sit on command. This will help them learn that sitting is a good behavior.
This page attachment contains additional tips on teaching your dog to sit anywhere, such as how to deal with distractions and troubleshooting common problems.
Teaching your dog to sit takes time and patience. Don't get discouraged if your dog doesn't get it right away.
By following these tips, you can teach your dog to sit on command, no matter where you are. This is a valuable command that can help to keep your dog safe and under control in a variety of situations.