There are topics on this forum that was compiled 2 years ago which could still be helpful for beginners, it consists of ways not to lose your coins:
Good topics on security and privacyIf they ask private keys. "Not your keys not your coins" is a popular crypto phrase and if anyone should be in possession of your coins or keys it should be you and only you.
Exactly, but today's wallet are HD wallets that make use of seed phrase to generate the keys and addresses, the seed phrase should be well protected just like the private key because it can generate the private keys.
They send you random links. It is pertinent to note that, you should not click any link from any stranger as they might be phishing links or a keylogger.
Some phishing email can be very similar to an email sent from a site that you are using, you should not click on it. I neglect many emails, the ones that always got my attention is because I authorized for it, which I would have been expecting to see.