Hey! I haven't used that theme so I'll take a wild guess.
Are you using the "Featured Image" when writing your post? It's usually on the bottom right of your Wordpress editor.

There is two ways you can do this, you can use a site map, or you can manually create page and say something like

My post about and use the name of one of your categories
then underneath make each post a hyperlink

i could be wrong but I think that you can only show your posts instead of a static page on your homepage and you can select how many you want to show.

Affiliate links never expire unless an affiliate program disappears. You don't have to worry about going back and updating affiliate links unless a program explicitly tells you to do so.

WA affiliate links have never changed in 9.5 years and we also offer lifetime cookies here so that if someone clicks your link they are cookied for life (as long as they don't delete them) and you will get credit for them as a referral.

Hi Marc. I totally agree with Kay's comments below. However I would advise having a housekeeping policy where you go back over your pages and blogs every 6 months or so and test the links to see if they are still valid. They don't have an expiration date as such but what they link to can be changed by the product seller.

This totally depends on the product or service you are/were promoting. If the merchant/vendor hasnt changed anything and still exists, you dont have to change anything...

Cheers,
Kay