Hi, if you are wanting to buy Bitcoin or any altcoin I would recommend using
Paxful. You can easily buy Bitcoin by hovering over the "Buy Bitcoin" button.
Once redirected just type in the amount of Bitcoin you want to buy, the payment method, and the currency.
If you are looking for a place to store your Bitcoin I would personally recommend
Electrum. I have used the Electrum Wallet for a little over a year now and have had 0 issues other than the
recent exploit that was found and patched.
Security Measures with Electrum:- Private key encryption
- Cold storage
- 2FA
If you are wanting an online wallet, I would recommend using
Coinbase or
Blockchain. Both are online wallets that have multiple security measures ranging from 2FA to passphrases to phone verification, etc.