Comment by H i s o k a on The Magic Tower’s Problem Child - Chapter 23

In the light novel, the story is only around Chapter 38, and Oscar won’t meet his first disciple, Lloyd, until Chapter 111. A lot still happens before that. After the current arc;
•Oscar first encounters Killian’s sibling—hence the Lockwood storyline.
•All level 3 mages will undergo a training camp at the White Tower, where Oscar serves as a professor.
•Then comes the Nightmare Baron incident, 
•Followed by a visit to the Dwarven Palace
•Major reunion with Moira Maine (the alchemist of Blue tower).
•Oscar also helps improve the Delivery Department significantly. 
•Afterward, there’s a collaboration with the Black Tower, (necromancy incident)
•Meeting the Sage of the Stars, and more training ensues.
Only after Oscar reaches level 4 will he be able to meet his first disciple, Lloyd, who is on the battlefield. Then followed by Shasha, who is now the tower master of White tower.