You should hear from the course provider within 14 days of the court case. If you do not then contact them in case the court has not passed your details on.
Once they are in touch with you, you can book on a course for as soon as there is availability where you want to do a course. There can be a waiting list in busy areas, some locations have courses less regular than others and some providers do not run courses in as many places as they claim and you may have to wait a long time to get a course unless you are willi;g to travel.