What nuances and secrets you know
Download the offline wallet generator from bitaddress.org or walletgenerator.net 's github page to your usb disk. The securest way is to create your private key on a freshly installed linux PC without any internet connection. Then use one of those offline paper wallet services and print your keys on a paper. You can't have a safer way than this.
Protecting your wallet is important. Especially you are creating yourself an account on bitcoin so security is very important. Especially now a lot of bad guys in information technology can invade enter your wallet easily. Be careful!