Hi meinong,
Welcome to the Mattress Forum! 
I hope you’ve had some time to look through the forum and gather some information from the mattress shopping tutorial.
If you have any questions, please feel free to start a topic and we’ll do our best to be assistive. And if you end up purchasing something, I’ll be interested to learn what it is and any feedback you have once you’ve had a chance to sleep on it for a while.
Phoenix