I don't know, it's hard to say, and it's complicated. The key is your own nature. See how much you can drill into it. The more you learn and know, the easier it will be. ...

In general, it may take 2-3 years to reach proficiency. Because you have electrical knowledge, it shouldn't be that difficult to get started. You know, copying the board, in the final analysis, is copying other people's things. If it really becomes your own thing, electrical performance is still important. Note that the distance between the pins of each component is fixed when copying, and don't change it easily. When copying again, copy in groups, and then copy the same. Actually, I think it's pretty fast.

Practice more, practice makes perfect. The more you copy, the more experience you accumulate. In a word, you need to do more. Only after you have done it will you know how it happened. ...