Can I redirect the front page without affecting others

Hi there… I’ve searched for a specific answer to this and there seems to be nothing exact. To be safe, I’ve set “Do Nothing” redirects for my admin pages as regex (^/wp-admin/.* or ^/wp-login/.* etc). I’m redirecting many other specific pages. Now, while not yet redirecting “all” site content (but not WP admin), I would like to now redirect the front page specifically and not affect the other redirects or admin. Will that work and would I enter the source as just “/” or the url, or? I hope this helps more than just me.