Learning to become an expert and professional takes time, by trying to learn 2-3 per day we will be able to become a professional trader in the next 3 years. Because becoming a reliable trader is not easy, it takes experience and a long time to learn.
What do you mean by learning 2-3 per day? I don't think it must be 2-3 per day. 
Everyone has their own way in learning, there is no exact way in learning. Sure, we must learn everyday to get maximum results. However, to be a professional trader, it must take for months or years. It can be few months, or few years. There is no exact time to be a professional traders/investors.
I don't have many time to learn trading mate, So I just talk about what I can do in crypto world. Trading needs along time to do, learn and always focus monitor the market.
it's the reason why I prefer in hold than trade, I'm really busy in my live.
It's true, sometimes things can seem hard to learn, but you know, it's never too late to learn, if you want to learn trading, do it, even if it's slow, I've seen that as long as our brain is active, because we have to do that kind of thing. things, I don't know but there are times when we don't take advantage of our power, I want to learn like 4 languages and I'm going to achieve that, to learn trading I did it in 1 week, but that was intensive, in 1 week what I did was read 10 books, and among those I read a lot about Wyckoff, Livermore and I learned about investments by reading authors like Warren Buffet, I even read books by Trump and Kiyosakii, as well as Elliot waves and how they can be applied.
I did that because my friends knew a lot about it, even the friends who helped me a lot to pass the subjects and it was not possible that I had stayed so long, when I saw, they had been very lucky and did not know that much, but it is never late.