You do not have to make a big production out of it. You do not have to even tell anyone you are beginning. Just begin. You can even quietly chart your progress. You can smile on the inside as you get closer.
I did that when I joined Weight Watchers a few years ago. I attended my meetings, weighed in, cried when I gained, smiled when I lost, counted my points, drank my water, made graphs, pushed away from certain foods, and by the time people noticed I was at my goal.
I did not need the fanfare. I did not want it. I wasn't so sure I could do it and did not need the pressure of an audience if I failed. I saw the look on other people's faces when they did all of the right things that week yet gained weight. No amount of comfort can erase that.
But to succeed you have to keep going. Even when it doesn't seem to make sense. Even if no one else is watching. And it does not always get easier. Sometimes it just becomes normal.
So set that goal and start moving towards it.