Many thanks for your responses.
1. Instead of moving bookmarks, even though that seems to be available, only documents show up. The person who helped me with the browser download thought my update to Mojave wasn’t sufficient to allow moving bookmarks, so I have accepted the fact that I may just have to recreate one by one on the Brave browser.
2. When I click on Brave for clearing browser data all kinds of options for cookies, etc comes up and totally confuses me as I want the best security and privacy, but don’t understand all the terminology to be able to choose. Would I be correct in assuming that however it is set might be the best choices? The other option is to find someone more knowledgeable locally to help.