I am new to this field so bit difficult for me...SO PLZ

I am new to this field so bit difficult for me...SO PLZ HELP..

I want to make website just same as wordpress.com

I have purchased subscription of wpmudev as i look that it has all the things which can make it so.

Tell me all the step by step procedure to make it , to use all the plugins req. OR I give you access to make it for me

I have installed wordpress through hostgator - quick install

Now i think i have to make it multi site enable but i want to make it like wordpress which gives options to user to take subdomain ( userchoice.mysite.com )

and ther own domain ( Paid )

In short i would like to just make new wordpress.com