follow that users "npub" + make sure both of u have common relay
relay grooming is weekly task. NOT a one time.
Discussion
I think you missed the part where I was asking about being NOTIFIED when someone posts. Not just having their post show up in my feed if I happen to scroll far enough.
what u looking is not see live note on your timeline but see "number" of new notes "posted" by whoever your npub is "following" somewhat like how many new emails in each "category folders" pushed (not necessarily opened) - similar to conversations notifications when someone open nostr client after weeks or months.