You can buy bitcoins from either exchanges or via marketplaces.
If you are a novice user of cryptocurrency, but already have a personal Bitcoin address and understand how Bitcoin network operates, obviously you are looking for a way to buy cryptocurrency simple and clear. First of all, we suggest you to find a list of popular online exchange points:
If none of these methods you do not seem clear enough, you can buy cryptocurrency here:
Mycelium - https://wallet.mycelium.com
Wirex - https://wirexapp.com
Xapo - https://xapo.com/wallet