Yes, now it is proxied again. Now wait, untill it is propagated and you will profit from Cloudflare`s Cache. And for your device please clear DNS cache to make it taking effect faster. TTL anyway was set to 5min.
No let it on “Auto”. This is the best setting unless you 100% know what you do.
TTL of 5min means it will take 5 min to have the change beeing propagated, as all devices shall just cache it for maximum 5 min.