Can I place the copyright tag on my webpage without having to sign up for anything?

[J V]

Hello. I read somewhere where original work is copyrighted from the moment of creation provided that it's in tangible form. Does this mean I can place the copyright symbol on the pages of my website without going through copyright registration? Can I be sued or something if I put the symbol on my website without consulting anyone or paying for it? No rude responses please. Thank you. I appreciate whatever help can be given.