@hungrygolf
RE Enable Multiblog – Where did you get “bp-config.php”? You should add enable_multiblog in wp-config.php just before /* That’s all, … Happy blogging. */ as posted at https://codex.buddypress.org/developer/developer-docs/using-multisite-with-buddypress/bp_enable_multiblog/ And, you should activate BuddyPress sitewide, i.e., via Network Admin > Plugins, not in individual site.
Do not touch the database. If you want a subsite as your primary BuddyPress site, then see section on configure the BP_ROOT_BLOG https://codex.buddypress.org/user/install-buddypress-on-a-secondary-blog/
