@socoda & @TonyaM, thanks.
I have asked to join the 'Healthy Living After Cancer' program with the Cancer Council & am expecting a call from them in the next day or so.
I will initially receive a weekly phone call from the cancer nurse with regards to a healthy diet (yes, fairly basic common sense stuff) & being active (again, for me, fairly basic stuff) but also she/he will help me set goals for improving on it... It is over a 6 month period, initally weekly, then fortnightly onto monthly calls.
I already have my first goal in mind & that is the be able to run 10km instead of 5km.