Who learns something new or do you need a mentor?

Question

1C-Bitrix

There is a task for Bitrix. But somehow I still swim in this system. Haven't done a single major project or store yet. So the usual video courses and read the documentation a little.
Well, you yourself understand that the training site is not all that.
php js css html know fine.
Question.
1) Did everyone themselves achieve everything in solving non-standard problems?
2) And if you still don’t know what to do or haven’t matured (how to say)?
3) How much time did someone spend to become a guru in it?

Answer 1

1) skills are earned only by one's own experience, the knowledge told by the "mentor" will not settle in the head.
2)

if you don't know

you open Yandex, drive in what you don’t know, follow the links until you find the answer.
3) a developer with 3 years of experience has the right to apply for managing a production team