Hi, I think you should be fine! I am on my 2nd potty trained Dragon and it makes keeping them a snap! As far as I know, neither were potty trained before I got them and both were mature , so you can teach an old Dragon a new trick! Our schedule works like this:
4:30 am - Big Bertha's lights go on
5:00 am - my alarm goes off and I get up, might hit the snooze once or twice.
I let the dog out and feed her, make coffee, feed Bertha her breakfast (she likes to be hand fed) and check email/surf for a few minutes
6:00 am - I shower.
6:30 am- I am finished in the shower and dried, the tub is still warm and I run a
bath for Bertha. She is usually in the tub for 20- 30 min and I make sure her water stays warm; if necessary, I drain and refill. Warm water seems to encourage poop. She seems to be getting better and better at it - she goes sooner and also positions herself at the deep end of the tub, right over the drain. My first Dragon, Lizzy, always went to the deep end and pooped over the drain, so there seems to be something about that.
7:00 am - she is back in her house with the lights still on.
The timer will be a very valuable tool in establishing the schedule; if you want, you could have the Dragon's lights come on before you get up so it's warm and awake before you get out of bed. Is the tank in your room? If you want the lights on before yours, you might move the tank to a different room so you aren't woke by the lights. If you keep the Dragon in your room, maybe it could have a "night tank" someplace else so the lights don't bother you, and then put it in the tank in your room during the day.