How can I protect information about me? I mean i want to create my adult site and dont want to be catch by somebody
lol, never do anything you don't want the world to know about. You can turn on privacy and you can hide behind fake identities but eventually something will leak and people will know who you are.
You can try using Tor browser in order to hide your IP address and it will not collect any of your personal information. Or you can try to use some VPN in order to hide your IP but the point is that some of them don't work properly and your IP may leak.
Domain and hosting websites provide domain privacy. Purchase domain privacy and also hide details in your hosting. Nobody will know your info. Check your details in who.is website. That's it, damn simple!
Easy, buy domain with bitcoin, use fake info, but even with your legal normal info with the whois protect functions you will be protected. This functions would be able to hide you from the web but take care, if you will do something illegal and you will be sued ( for any reason ) the hosting / domain provider will pass your information.
with the right legal clout or investigations, most owners can be outed. People are sloppy and leave trails.
@sarahk is right: no method is perfect if you are planning to do something illegal. Government authorities can generally find out anything that they want to find out unless you are a very skilled fraudster (and even they get caught.) On the other hand, if you are mostly concerned that your family, friends, neighbors, employers, etc., do not find out about your involvement with a legitimate business in the adult industry, using a domain privacy service as @3936296 suggests, will probably work for you.
You can use gift debit card to purchase a hosting. You are supposed to provide your real name to purchase a domain name, but I don't think it is strictly enforced. But if you are afraid that it can ruin your reputation, you better stay away from it!