When connected, Rizon provides you way to protect your nickname by registering it and providing a password. You can set it up so anyone who tries to use your nickname gets kicked off that nickname if they don't use your password.
All nickname-related stuff goes through a Rizon bot called "NickServ". To communicate with NickServ, you need to use a private message. For example, if you type in /msg NickServ help and hit enter, you will send a message to NickServ, who will respond with an automated reply on the various commands you can use with it.
To register your nick with NickServ, all you need to do is the following:
Once registered, you can do a number of things with your nickname, such as: get a vhost, get access on a channel, and turn on nickname security. For more information, make sure to /msg NickServ help.
For more information and details about registering your nickname, you can also take a look at the wiki page: Rizon Wiki - Register your nickname.
Similar to NickServ, you can register a channel with ChanServ. This will provide you a way to get back your "operator" status (the @ symbol) in the channel even if you quit/part or lose it for some other reason. It will also provides various other utilities to help you manage and enjoy your channel.
These are the steps you need to take to register a channel:
This is all that is needed; the channel will be yours now. For more information and details, see the Rizon Wiki - Channel Registration page.