If pcb layout can be learned in a few days, it can generally be learned in three days, and what kind of learning depends on the personal mind. This is divided into a variety of situations, the proficiency of painting ah, there is no guidance ah, what if the primary level, some guidance, about 3 days can use protel to draw pcb,
I taught an apprentice, graduated from Huizhou College, hand in hand teaching, it took 5 months. Now you can make the HDI board. A little basic, others teach 3~6 months.
Generally speaking, pcb layout can be completely learned in a week, and the rest is just proficiency.