Can you just teach me about decimals?

No. There's a reason why they take weeks or months to teach it in school.

The reason is because that's what it takes. You need to hear it a little at a

time, and practice it a little at a time, in order to learn it. If you could learn it

with a 5-minutes explanation, then that's the way they would teach it in school.

There are a few people who can learn it that way, but not many.