How does search and privacy work within Wix forums.

I'm looking to get my local club on board with allowing me to create a new web site on Wix and incorporate a Wix Forums page. Looking to have about 4 forums based on different topic areas and I have two questions:

1) Can the forum landing page showing the 4 forums to join be public, but the forums themselves be private until they become a member?

2) Can members of a forum search for specific posts, or follow them so they don't lose the string of posts?

Thanks