Get mum to nick down to Coles or Woolies and get a timer. You can get 2packs for under $20. Have your heat light come on for 1-1 1/2 hours and off for an hour between say 8am and 6pm as an initial setup. My heat mat cycled on and off 24/7 for similar periods to the light. If I were you I would get a friend who really has some experience to come over and have a look and help you sort out that side of things. My fishtank enclosure ran both light and heat mat, the heat mat warmed some black coffee rock as a basking spot and location she could choose to find as needed and the lamp helped with the ambient temps during the day.