Okay…. Read all the threads in the forum on this subject.
Wasn’t able to use the if/else commands version per the instructions because I have sidebars designated as Left and Right, rather than the generic empty sidebar function in page.php.
So, finally found the easy instructions for creating a Template file, and WordPress automatically created the Template dropdown.
Created a new Template file, omitting the Right Sidebar, and of course in the Forum page selected that Template.
Problem is, the Right Sidebar is STILL SHOWING…???
I looked at another thread, and it said to check if other files were calling it (such as loop.php), and I couldn’t find any, and I cleared caches.
Found the “content” css, and simply created a new one copied of it, but with a new name, and then went to the div in the new_template_page.php and changed the div id name from “content” to my new name.