For starters, yes flash can embed into HTML pages, in fact if you change your export settings it will export the swf into the html page for you, all that leaves you to do is to upload the html page and the swf file to your server. To do this, open flash, under file, publish settings. From there you just check the html check box, and then click publish.

OK now I looked at this site here.

http://www.ragnarokcs.com/

This is a nice professorial looking website. This takes lots of work to do. But with some practice you can accomplish such a site. Start by learning flash and how the program operates. After that I would recommend buying a tutorial from this guy here.

http://www.cartoonsmart.com/

or here,

http://www.learnflash.com/

Both of these guys are great experts in macromedia and other website design products. They will have you up and going in no time. If anything download the free tutorials they offer. Let us know if you have any other questions.