For someone who learn semi fast to learn java from scratch. By learning java i mean being able to understand and code decent java. (Not being actual pro but being able to code somehow good stuff)

Explain how you would sort a list of numbers from highest to lowest in a way that will work for any given data set.

If you can figure this out without googling, then you can program.

Are you talking about understanding complexities or just know how to do something as simple as a nested for?

I mean understanding complexities and coding various java scripts for multiple bots. (That would be my first goal) then increase my skill set.

Complexities are a whole class in itself.

the games you want to write bots for would no longer be popular by the time you're ready to write the bot.