Do not use Coinbase! They have extremely poor service and will not support you if you ever encounter issues logging in. Instead, they will write a generic response to your ticket and immediately close it. If any major bank tried to pull this they would get buried in lawsuits.
Again, avoid this service at all costs. Forget their greedy 5% fees on deposits/withdrawals - it doesn't even matter if you can't get your BTC or USD back period. That's a 100% fee.
I think this Coinbase is meant only for U.S and other countries because when I get to know about Coinbase things were really complicated to put in together. It's never meant for newbies who don't know how to make use of it. At my point when I started Cryptocurrency I only heard about it being the best wallet. For now I think one have to understand fully different types of wallet and how to make use of them. My own advice will be make use of a wallet which you have the private key to.
If you want to buy / Sell the bitcoins only then you should be a citizen of USA but anyone can create the account there and use it as a wallet . Although i do agree that It is better to save bitcoins in personal wallets where we have access to private keys. There is always some risk involved if we store our money on centralized locations.