I’m not surprised, looking at your schedule. I’m feeling exhausted, just from reading it. 
I’m an old lady of 26, but being 20 isn’t so far back that I can’t remember it.
[I]I needed more than 7 hours of sleep[/I] (and I suspect you might, too).
Seriously, I’m wondering if you might be suffering from some long-term, gradually accumulated difficulties with mild, chronic sleep deficit. These things can creep up on you very gradually, without you really noticing the cause. I’m wondering whether an increase to 8.5 hours of sleep per night, for 3 months, might demonstrate a world of difference?
You’ll perhaps instinctively feel that you don’t have the time for that, and with a schedule like that, who wouldn’t feel that? (I know one has to be willing to make short-term sacrifices for long-term benefits, but it really can’t be a lot of fun, going to bed at 8.00pm most nights, at the age of 20? But this goes to show how hard it is for “other people” to make suggestions, because “everyone’s different”? In your position, I’d probably go to the gym for 45 minutes two or three times a week (if that, to be honest), instead of what you’re doing now, but I’m guessing that will probably be an unacceptable experiment for you?).
About the same amount as you … maybe a little more. It depends what exactly you’re covering and referring to by the additional 9 hours per week “looking at forex-related things”, so I can’t quite tell, from your description.
Much longer than you’re aiming for, I suspect. 
I was reading/learning/researching/being taught/practising on demo for four years (admittedly this was partly because I was “under-age” and couldn’t trade with real money until I was 18), and then it took nearly another three years after that before I was making what most people would call “a decent living”, although I admit I was “profitable” (i.e. rather than losing) fairly quickly, after all that education/research.
I was in an easier position than you, though. I was at high school to start with, and after that doing relatively undemanding courses at university while learning/trading, but I won’t pretend that that added up to anything like the same hours you’re doing in your job. It would definitely have taken me longer, with your hours/schedule.
Sorry - probably not what you wanted to hear, really. :8:
It’s not easy.
It helps more than you’d expect [B]not to be in a hurry[/B], and to be well-rested and alert, and to have had plenty of sleep.
Honestly. 
The bad news is that people very often have unreasonably high expectations of what they can achieve relatively quickly.
The [I]much better[/I] news is that most people also have unreasonably [I]low[/I] expectations of what they could achieve slowly and gradually.
However you look at it, you clearly need to change [B]something[/B], though, if you’re always feeling worn out and often reading trading-related material and being too exhausted to take it in beneficially?