I want to learn more about reversi, I am really new to it, and can't figure out it yet, I am unable to beat masters here, is there any websites, or advise one could offer.

Is there a such thing as defense, attack?

what is safe play, what is agressive play?

I need a site with the names of openings, and more to the point what sort of opening is for what sort of play?

Safe play would be avoiding to play players who are rated 1900+ :)

Seriously though, an excellent tutorial which covers the basics can be found at http://www.reversi.se/strategy.php.

I'd like to recommend another online board reversi site:www.kurnik.org

“Othello reversi pdf book”
Read Ted Landau first and then Brain Rose

those 2 books, and lots more resources found at the British Othello Federation:
https://www.britishothello.org/

you'll see the downloads under the tab 'resources'. I should read the things myself!
meow