<p>There is nothing wrong about it. It is perfectly ok to answer your own question, the system even allows it and changes the name of "answer" button to "Answer your own question". This was done in the past by many users, even high-reputation users did start their own question and answered them, e.g. <a href="https://stats.stackexchange.com/questions/134282/relationship-between-svd-and-pca-how-to-use-svd-to-perform-pca">@amoeba in here</a>. Usually you ask a question if you want to learn something, but there is nothing wrong with starting your question if you want to share your knowledge or solution of some problem. As in @amoeba's case, creating and answering question by yourself may be also a good way to produce answer for a generic question that appears on the site over and over again, so we have an answer for the reference.</p>
