The easiest way is to use the apple web site "support" page. First find your serial number from you box or from "settings==>general==>Serial Number". Then, click on "Check Your Service & Support Coverage" and enter your serial number.
There is a model number on the back of your iPad, just google the number.
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.