Promotion of the online store in search engines

A specialist in search engine promotion of sites is required. It is necessary to promote the online store of sailing and boating equipment. You need to promote in search engines Yandex and Google. The main emphasis is in promoting on the search engine Yandex. Without the withdrawal to the first positions in Yandex, the work will not be considered completed.
Interested in the cost of promotion and timing. In your proposals, indicate the experience of search promotion and what sites were engaged and what results were achieved.