As Moonlit Sonata has said once you do copy some text you will need to then paste it somewhere. The native Notes app is very good for this task, just long press the area you want it and you will then get some options, one of which is paste, press this and Voila, it's there!
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.