Look for a course updated for KiCad 7 or 8 (check the "Last updated" date). Pair it with a cheap PCB order from JLCPCB to validate your learning.
A hobbyist who has built a few circuits on a breadboard and now wants to design their own custom printed circuit board for under $10 (manufacturing cost). Udemy - PCB Board Designs with KiCad
Would you like a specific list of recommended KiCad courses on Udemy based on current ratings and recency? Look for a course updated for KiCad 7