Wikipedia not only allows you to create revise and edit articles but it wants you to do so. You just need to remember that you can t break Wikipedia and although there are many protocols perfection is not required as Wikipedia is a work in progress.
If you want to import text that you have found elsewhere or that you have co-authored with others you can only do so if it is available under terms that are compatible with the CC BY-SA license. You do not need to ensure or guarantee that the imported text is available under the GNU Free Documentation License unless you are its sole author .
Wikipedia:Citing Wikipedia – Wikipedia
Wikipedia:Contributing to Wikipedia – Wikipedia
Wikipedia:Copyrights – Wikipedia
Help:Your first article – Wikipedia
Your citation should normally list both the article title and Wikipedia The Free Encyclopedia much as you would for an article in a paper publication. Every article should be a separate citation. Most citation styles will likely require the full article URL. You can …
If you have read a book or article yourself that’s all you have to cite. You do not have to specify how you obtained and read it.
Thus the contributors do not need the credentials that one would require for journals that publish research; rather the editors simply need to be knowledgeable enough to repeat the information they find and cite their work and Wikipedia’s policy requires all information in its articles to be cited. …