The iPad charger is much bigger than the iPhone charger but it doesn't matter if you do get them mixed up, no harm will be done. The iPad will take a lot longer to charge with the iPhone charger though.
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.