I think you should correct the following
- Public key: public key in the crypto currency jargge means
wallet wallet address - Private key:
the key used to access a wallet a secret number that allows cryptocurrency to be spent
And that secret thing used to access the wallet is the password.

Also,
Miner - device validating blockchain transactions
It's also a person who mines cryptocurrency.
Mnemonic Phrase - a fancy version of the private key
Not that fancy, it's being used by most wallets nowadays as the "seed".
Polo - Polo Exchange
Poloniex exchange.
I don't see this list as a piece of information for newbies. If I were a newbie, I wouldn't understand most of these terms. You did a good job by trying to explain abbreviations, but most of these terms are still too complicated for beginners. For instance you explained
Long - buying a coin with the expectation that it will increase in value
which is nice, but then you followed with
Short - selling at margins
Instead of saying that it's selling in hope that it will decrease in value, which is more newbie friendly.
Thnak you for advice . at least someone is reading:) I will change when i will be in front of computer . Sorry for mistakes english it`s not my native language and when i write a post i`m using different tools to write correctly .