You need CAT C before you can learn CE. The provisional CE goes on your licence when full C is gained. Beware of “back to back” courses; they simply don’t exist in reality. The fact is that your licence (or evidence from the examiner) has to find it’s way to DVLA so they can add your entitlement together with the provisional CE. You must allow at least 3 weeks for this.
The medical doesn’t require a medical report. Depending on your doctor, you may or may not need a current opticians prescription if you wear glasses. Otherwise, it’s a straightforward questionnaire + blood pressure, weight and height.
Hope this helps; fire away with any further questions,
Pete 