Hence, I am looking for ways not to spread myself too thin all over the multitude of stuff I wish to be able to do and master.
Concentration on only a couple will likely lead to fast improvement and more motivation during that time, before moving on. They say "choose the ten things you want to learn, and then cut 7 of them."
That said, I think that this struggling could be dealt with by just training my focus a little more.
Perhaps the cause for it is because you have avoided it in the past?
Umm. Yeah. I wish it was as simple. Maybe it is. Currently it is still more like I keep 7 and drop 3 xD. But at least, I am not trying to do all of them at once and failing to do anything at all in the end.
It is probably trauma. I think I basically was made to believe I suck at it. Something like that, and I never really pushed myself to improve in that area.