IF? First off it would be unethical to knowingly not do what's right for the animal. If your schedule or personal preferences don't allow that, then you should choose an animal that works within your parameters.
Anyway, a hatchling dragon needs to be fed 3 times a day so that won't work with your schedule. If you get a healthy started baby from a breeder you will only have to feed live food twice a day. A well started baby would be 6 - 7" long.
The maximum daytime for the species is generally accepted as 14 hours. So if you have the lights come on at 5:15am and let the dragon warm up for an hour you could feed at 6:15 and then go to work. The lights would then go off at 7:15 so you could do the 2nd feeding up until about 6pm if you needed to.
Feeding a growing dragon is a moving target. A 6-7" dragon should eat 20-25 crickets per day in 2 meals but in a month that number will grow to about 70-80.