At last a decent thread!
Nice to see you posting again Mr V
I always have a young lurcher out with me all of the time from an early age, mainly on a lead just watching.
Basic commands are a must, recall, retrieve etc. also from an early age but not too much so as to bore the dog.
I encourage them to jump as soon as they are old/developed enough (mesh at the bottom of pen door etc)
The first time lamping I tend to keep them on a lead, again watching. On the next time they might get one or 2 easy slips, and gradually build them up over a period of time, as and when they're ready, som