Which Buddha statue should I worship first when I go to the temple to worship Buddha?

Suiyuan! You can worship which statue you meet first, or you can worship according to the level of realm and results, for example, worship Buddha first, then bodhisattva, then arhat and then the French king. You can also follow your route, for example, you have to buy incense first, then you have to read books, and so on, so you can worship Buddha wherever you pass along the way.