There is no correct point at which a widow or widower should start meeting people. Six months may feel right for one person and far too soon for another. Grief does not run like a kitchen timer, and joining a dating site does not mean you have finished grieving or forgotten the person who died.
Start with the smallest decision. That might be writing a short profile, exchanging a few messages or meeting for coffee in daylight. You do not owe anyone a grand explanation of your past, but a clear sentence can prevent misunderstandings: “I was widowed three years ago and I am taking dating slowly.” An emotionally mature person will respect that.
A new connection does not replace an old one. The two experiences can exist in the same life without competing.
Some widowed people prefer to meet another widow or widower because there is less explaining to do. Others would rather meet someone with a different history. Both choices are reasonable. What matters is whether the person can listen without becoming jealous of memories, rushing intimacy or treating bereavement as your entire identity.
Watch how you feel after a conversation. Interested but nervous is common. Pressured, guilty or drained is useful information. Pause when you need to. A decent local match will still understand boundaries tomorrow.