This is strongly discouraged by Wikipedia. You either have to wait for a volunteer to notice you or, hire a consultant who knows the proper procedures. If you try yourself, you still have to disclose your Conflict of Interest and abide by the Wikipedia mission to produce a neutral, reliably sourced encyclopedia. As a result, many such entries are rejected when reviewed independently in the general “Articles for Creation” queue. Once an article has been rejected, it becomes more difficult for a new article on the same subject to be approved.
Wikipedia editors will check to see what else you’ve written or edited for Wikipedia. If there’s no other work unrelated to a single company or individual, they’ll easily deduce yours is a special interest account with a probably conflict of interest. Special scrutiny will result. In the case of new entries, this may means the entire piece is rejected.
At WhiteHatWiki, we’re experts at writing Wikipedia articles, so we’re well equipped to make sure your piece is polished and suitable to Wikipedia from day one. We also write about lots of different subjects.