Setup to cache only Post

How do I set it to cache only Posts?

Currently my cache is working but it cache everything which is good, but let say I just want it to cache only Post contents. Not the homepage because I need it to show new post being added, Categories, Pages etc … just the Post alone and whatever is on that post, then when users visit my site from homepage they will see new posts summary and when they click the post it will take them to the full contents post cached.

Thanks very much.