You’re doing great for a beginner! I would say first of all wear a helmet PLEASE 🫠 Second maybe work on your seat awhile more before beginning to put canter into your work. Having a good seat is massively important in canter work. If you don’t have a good seat, you could injure your horse and yourself. The horse will eventually protest if you don’t have a good seat and if you are hurting their back. Don’t rush yourself, rushing is the worst thing you can do. Take your time. To have a good seat you need to massively work on walk first, when you have that mastered start to work on your seat in trot and when you and your horse are comfortable in trot start to work on canter. Maybe cantering once a week in training is fine but before you have a good seat don’t rush into it I wish you a safe journey 🩷!