Arthur was no longer inside his room, but outside of the city in a woody area. The reason? He needed privacy to start his training.
It was early in the morning, as he had slept all night after those tiring fights. There were still 2 weeks before leaving, but Arthur did not want to lose his precious time.
The first element he wished to master was fire. He already had his Fire Breath during his dragon form, so you could say he wasn't a complete beginner.
"You need to start with the basics. First, follow this chant mentally and try your best to absorb the sunlight. These rays will make everything else you learn about fire more effective."
Arthur read the first page about the fire element in that book. It said he needed to master a sort of meditation, but unlike mages who meditate to gather mana from the air, Arthur had to absorb sun rays.