I've spoken English my whole life. I actually intentionally mispronounce some words like calling a pretzel a prentzel. I don't like how pretzel sounds, that's all. I don't really pay much attention to how this stuff is structured outside my own writing, but you seem like you are doing fine with English. I've spoken it my whole life and probably didn't make sentences that well until I was in 7th or 8th grade.
Too is used to specify amount or add additional information. Not sure what else it does, but I'm assuming those are the basic uses. To is used for direction related stuff and when mentioning stuff involving actions. Here's a few examples of both since those descriptions probably are not that learner friendly(hopefully that isn't offensive...).
Burger went to mouth after school.
That's way too much yarn for Kirby to eat!
The Moon sure knows how to make people insane.
Jim Pickles went with me, too.