It's a journey, not a destination.
If you have an engineer's mind and like to tinker with mechanical stuff -and you are motivated into learning bikes, it will happen. I once bought 15 "grab bags" of random bike parts on ebay (they were cheap --no other bidders) because many looked to contain parts I'd not seen before. I spent hours going through those parts to figure out what they were --and mostly tossed them out. I also started picking up bikes left out for garbage and restoring them --and then giving them away to neighbors. I never attended UBI or BBI but I do own a full set of the Barnett's manuals. I love conjuring up a new project idea and then trying to make it happen.

I guess my point is that you'll need to be motivated. If you're looking for a magic switch to throw or short cut to becoming an expert --probably not going to get there. It's a journey, not a destination.