It's really great. Thanks to Rookiss, I don't have to go to private education, and I don't have to buy thick textbooks and suffer alone, so I think I can prepare for employment. It would be meaningful to study a thick book on my own, but since someone who has studied it explains it in an easy-to-understand way and provides examples of only the important parts, I don't think I'll buy a thick book and can replace it with the teacher's lecture. ps. I would appreciate it if you could release the DX 12 / game math lectures soon. ㅠ.ㅠ I want to study this field quickly. The things that come up on Google are too difficult. The books are too thick, so I can't even think about buying them.