Theme with multi-language options

[GrAvEsSs]

Hello, I'm going to create a WordPress website. I don't have much knowledge about this but I am trying to do something with research on the internet. I will make one site in Turkish, but when a foreign customer, for example, a Spanish customer comes, they should be able to select their language from the top right corner as shown in the photo and the website should switch to Spanish. How can I do this, any theme recommendations, etc.?