Here are some ideas for jumping courses for beginner horses:

1. Start with a small crossrail and progress to a vertical. As the horse becomes more confident and comfortable, you can start introducing small spreads and single fences.
2. Set up a small, simple grid consisting of a crossrail followed by a vertical, and then a crossrail again. This will help the horse learn to adjust its stride and balance.
3. Set up a series of ground poles, gradually increasing the distance between them. This will help the horse learn to lengthen and shorten its stride and become more adjustable.
4. Incorporate a small water jump or ditch into your course. This will help the horse learn to trust its footing and become more confident over fences.
5. Set up a small gymnastics exercise, such as a bounce or a one-stride double. This will help the horse learn to react and adjust to different fence configurations.

Remember to always start with small, simple fences and gradually increase the difficulty as the horse becomes more confident and comfortable. It’s also important to work with a qualified riding instructor or coach to ensure the safety of both the horse and rider.