Be an apprentice!
Become an apprentice, not the Donald Trump kind. Find someone you work with that will apprentice you. They will show you the details of the job. This is different than a mentor although it could be the same person. The person that you apprentice with shows the in’s and out’s of the job. They will show you how to make a cable, how to troubleshoot a problem. Most trades once were apprentice programs. You would start out as an apprentice. In the past this would often start at about age seven and last for 10 years. You then became a journeyman and finally a master.
In the fast changing tech world, it would be difficult to spend 10 or more learning something since that would be obsolete after that long. You can still follow the idea and learn the basic skill that you will build on in the future.
Once you are a master, find someone to be your apprentice.
