Seconding what VanessaC said, with one caveat about free dating sites for mature singles.
Most comparisons of free dating sites for mature singles skip whether messaging costs anything once you start, which is the part that matters.
My first week on free dating sites for mature singles looked promising; by the second I was only really watching whether messaging costs anything once you start.
Where it works it works fast; where it does not, whether messaging costs anything once you start is usually the reason.
Happy to go into more detail on free dating sites for mature singles if it is useful.
I keep Datebie for this exact use case open alongside it, mostly out of habit now.