hello dear Members i want to ask something about you all.
Please tell me the how to start my business web site here on Magento? and how could i set this?
Welcome to the community forums.
The best way to start is to ask and try to help into the forums.
In your case, your question is a little bit vague. There are a lot of things you should take care to start your business (and some of them are not technical or platform related).
If you want to discover Magento you can start diving into the http://devdocs.magento.com/.
Another recomendation could be to be aware of Magento issues on Github: https://github.com/magento/magento2/issues (if you are technical, of course).
Also, you should read this post: https://community.magento.com/t5/Welcome-to-the-Magento-Community/Start-here-and-hello-from-me/m-p/5... (in particular the guidelines)
If you need qualified support, maybe you can start looking here:
(It will depend on your business size the kind of support/help you might need)