Wikipedia:Your first article | gathering references
Gather sources for the information you will be writing about. To be worthy of inclusion in an encyclopedia, a subject must be sufficiently
As noted, the sources you use must be reliable; that is, they must be sources that exercise some form of editorial control and have some reputation for fact checking and accuracy. Print sources (and web-based versions of those sources) tend to be the most reliable, though some web-only sources may also be reliable. Examples might include (but are not limited to) books published by major publishing houses, newspapers, magazines, peer-reviewed scholarly journals, websites of any of the above, and other websites that meet the same requirements as a reputable print-based source.
In general, sources with no editorial control are not reliable. These include (but are not limited to) books published by vanity presses, self-published 'zines', blogs, web forums, usenet discussions, personal social media, fan sites, vanity websites that permit the creation of self-promotional articles, and other similar venues. If anyone at all can post information without anyone else checking that information, it is probably not reliable.
To put it simply, if there are reliable sources (such as newspapers, journals, or books) with extensive information published over an extended period about a subject, then that subject is notable and you must cite such sources as part of the process of creating (or expanding) the Wikipedia article. If you cannot find such reliable sources that provide extensive and comprehensive information about your proposed subject, then the subject is not notable or verifiable and almost certainly will be deleted. So your first job is to go find references to cite.
Once you have references for your article, you can learn to place the references into the article by reading