EVERY note you create with a *dollar sign*boost will be turned into a prism. 

No need to add $prism.

 Also, remember if you want to limit your prism you can include a list by adding #listr where 'listr' is the name of your list. The #listr has to come immediately after *dollar sign*boost for it to be considered. 

Create a list at https://listr.lol

So, typing $boost #following will create a prism only with the npubs in my following list 
https://listr.lol/a/note1t77gp4num89ff0zd0l7zadr9ceyz83pzxrur6rne2nkdd0gcxrwqcp0lp0

Finally, follow nostr:npub1arcweuxy0zkdcg08sljh058qp02ytrgnpzh4csa3ar42szyfgrpsw6ggtw  and check out https://makeprisms.com for some more deets.