I studied animation at college, so I already was used to fill timesheets and such. I only had to learn the Japanese way to do it, which varies only in details from western ways.
As for Japanese notations, I think it would be a bit much saying that “I learned them”. I know how to use the basic ones, but I can hardly write most of them by memory, so I use a big file with dozens of notations I’ve used previously so I can copy an paste them in my cuts (I cheat). The important thing is knowing when and how to use them, and that has taken several months for me. I’m learning every day.
About tools… I’m not really sure if I undertstand what you mean by that, but I’ve never been too focused on tools, like software, for example. If I needed, I could animate on paper and the results would be very similar, as it’s basically the same ammount of manual work. What’s really going to make your work on anime much easier is your ability to draw well and fast.
For that, the boring answer is “draw a lot”, but there are a few things that can help you develop that ability faster, like practicing gesture drawing. I recommend you the book “The Natural Way to Draw”, by Kimon Nicolaides, as most of the information about gesture drawing on the internet is actually full of misconceptions, don’t even bother with youtube.
As for practice routines, my personal way finding a subject to study and draw as much as I can of that in the least ammount of time. Example:
-There’s an artist I like and I want to learn his drawing style, so I get as many images of his art as I can and I trace them non stop for an hour or two. I can do several hundreds a day, and the style gets saved in my memory.
-I want to learn from realitic fight scenes (or anime fight scenes, it’s the same), so I download a king fu movie and copy every single frame of a fight in gesture drawing, spening at most 10 seconds on each drawing. I can do a couple of thousands of drawings in a day of work. After that, you get a really good feeling of the kind of movement and mechanics existing in the scene.
-Same if I want to study anatomy, for example. I get some good guides or book and I copy the thing several times very fast until I learn them.
This is the way I’ve found I can learn my subject and improve my speed at the same time.
Appart from that, It’s always good to study perspective and composition very carefully, and to practice sketching backgrounds, because Japanese Layout requires you to provide a background sketch.
It’s all my personal view, but I hope it helped a bit.