Difference between a bitcoin wallet and the blockchain As the title said, what is the difference between the bitcoin wallet and the bitcoin core, do i have to install both of them to work? Can I just have a bitcoin wallet?
As stated in comments, the blockchain is a public record of all bitcoin transactions. If a wallet is like a bank account, the blockchain is the currency system. 

For a new or casual user, it might be easiest to use a remote web-based wallet, rather then one on your own device. In that case, you don't really need to worry about interacting with the blockchain. For more information on remote wallets you can use, go here https://bitcoin.org/en/choose-your-wallet Click the "web" icon and you will see seven options to consider.