LOL well what's wrong with making it easy and getting a fan page builder?

Facebook is pretty much good at giving hints on what to do as you take on the process of creating your own facebook fan page. Experimenting with it can teach you the best way to do it. Why not create a dummy account and proceed with my suggestion. By the way, there's a bunch of guides you can find if you search for "how to create a fan page in facebook" on Google.

Go to Facebook and click create a fan page. Load pictures, content, etc.. Get likes. Your done.

don't know how to use fan page to promote product

I think one of the top things you should do with your facebook page is start to build social credibility, which will help establish your brand. Check out my services (in signature below). We can help you with your credibility.
Another great thing to do it have a custom fanpage cover made for the top of your page: THis warrior has very clean work 88crxsi. The link is to his WSO (not affiliated link)

lot of videos are available in you tube. it is best place to learn more about fan page

just start by creating a fan page and share your information through this page. Try to update this page and you can. Share valuable thoughts.

Update you facebook page with all necessary details of your business/product. Post relevant stuff, engage with the fans, See what are your competitors doing.. try to be unique from them. Build your name and reach out to the people.

There are thousands of blog posts already on this topic. Just to a small google search you would be able to read thousands of posts describing how to create fan pages and how can you customize the page. But my honest opinion is you need to emphasis on generating sales leads than creating a fan page attractive. In facebook there are thousands and thousands of fan pages. Very few of them are getting fans for aesthetic looks. But if you have a bulk no. of active fans who are not generated by bot rather added as they are interested on your product you would be surely going to do some good business.

It's very easy write on youtube it tells you how to create?

be adding interesting content there, put some interesting videos there and keep posting interesting posts and make sure to bring more fans to it.