I'm not the kind of person that like to sit and have a study session. I know that sometimes you cannot avoid this, but I always try to avoid.
During university I had develop something like a method to learn a new code language, framework, lib, anything that you can find on Youtube. And after entering the world of fighting games, I improved this method.
The beginning of the path to learn and understand fighting games is:
Learn and master the basics/fundamentals.
Someday I'll write about the complexity and what makes fighting games great, but today we'll continue only with this statement.
How do I use this method?
If you're learning a new language and don't know NOTHING about, you should start your study session watching videos with basic phrases. A "How to introduce yourself in X" it's a great video to start. Pick some basic grammar videos/texts to understand, at least, how a phrase is formed. After this, you should go back and re watch the same videos with a lot of attention in the phrases mentioned. You must apply your knowledge and try to recognize patterns in the language that you're studying.
The beginning of this method is kind of difficult and you'll probably struggle with something specific in your learning adventure. When this time comes, you must google it. There's a lot of forums, subreddits and sites where you gonna find your answer. Don't be afraid to ask!
With the answer in your hand, put this in some app like Anki with the patterns that you noted and start a daily review of what you've studied.
Okay, now you have mastered the fundamentals of a language. What do you do?
Challenge yourself with something fun!
Something that you like or will probably like.
If you like to read as I do, you can try to read a book with an audio book. You can get only a tiny part of the text and apply your ability to recognize patterns. Or you can watch some videos about cooking, travels, places, people, anything that you like. Little by little you gonna build a great vocabulary.
Keep challenge yourself until you have learn what you want. It's good thing to reward yourself with something after achieve some goal.