Hi

The course Kez393 mention's (REMO) is a pitch side trauma course and is more advanced than first aid at work or similar. Pitch Side Trauma qualifications are good to have but are not generally expected until you start working with elite athlete's they are also expensive and depending on the qulaification may have to be refreshed annually. As long as the first aid course your on covers CPR, wound management and the basics on spinal/head injury then you should be ok. With regard to other courses massage and taping are the place to start.