I've been reading official BTC documentation and now I'm completely lost. Documentations is too tangled and written in unnecessary many words. They have:
https://en.bitcoin.it/wiki/Address
https://en.bitcoin.it/wiki/Accounts_explained (no, actually not explained)
https://en.bitcoin.it/wiki/Wallet
Please, somebody tell me the difference between them in a simple manner. What's an address, an account, a wallet, and how does the keys fit in.
"Accounts" are a concept limited to bitcoin-qt, and it's probably better to forget about them entirely.
Each address has a corresponding private key, that you use to move bitcoin out of that address. A wallet is simply a collection of (address, address_key) pairs.
Some people also use the term "wallet" to refer to the software that implements the wallet functionality.
Obviously, this is a grossly simplified answer, and not strictly true, but useful if you just want to understand bitcoin superficially.
