You need to make a new page, don’t put anything in the body of it, just have the title of the new page be whatever you want your blog page name to be (ex: BLOG).
From the Dashboard go to SETTINGS then READING. Under Reading select the second option, “A Static Page”
Make the FRONT page be whatever you titled the static page of information…mine is an introductory page about me and the site. Then select “blog” (or whatever you made that new page title for your blog) for the second option, POSTS.
This allows you to have a static first page with whatever information you choose to have, but have your blog show up under a different page on the site.