This gets requested a lot and the general answer you get from everyone is don't do it, there is no need for others to know (except in some circumstances i.e. telling a wife/partner/girlfriend).
The desire to tell people is common and quite understandable from a psychological point of view.
When you discover the world of ABDL and find yourself interested in diapers it can feel very lonely, at first it may feel like something is wrong with you and that you do not fit into societal norms. We as a species are very much pack animals, we feel a deep instinctive need to be part of the group so this feeling of being separate really strikes a chord and perturbs us.
As time goes on and you begin to accept it and get more comfortable with it yourself like it almost normalises for you, the need to tell others and share this thing with them and hopefully gain their acceptance as well increases, "It's not so bad right? So maybe they'll be fine with it", well maybe your friends and family will would accept it and be ok, maybe they won't, do you really want to risk that? What purpose do you hope it will achieve? Those people will never look at you the same way again regardless if they accept it or not.
We get that you don't want to feel like you have to hide part of your life and you want to be free to do things, to be accepted by your circle and to feel like one of the heard, a lot of us here feel the same but the simple fact is that most of the time it will not go how you want or expect it too.
Know that you can fulfil that deep need to share on places like this, sure it's not the same as having the people close to you knowing and you may never even meet anyone here in real life so it can still feel separated. But unless you have a real serious reason to tell people then it's probably best to keep quiet.
I personally told my mum (whom I live with) because I wanted to switch to cloth diapers and needed the freedom to be able to launder and dry them, it was a big thing for me I really wanted to be back in cloth and have wanted it for nearly 2 decades. I knew her well enough to know for sure that she would take it in stride and be ok but it still took me a long time to decide that yes I do need to tell because if I go cloth she is going to find out regardless.
At the end of the day it's up to you what to do and if you choose to go through with telling then you can probably find support here, but we'd all prefer you to be happy and hidden than depressed and isolated and possibly disowned because telling people backfired.
Unlike wetting a diaper, some things are better kept in than let out.