I'm not really getting a mature vibe from a married woman with three children, who is presumably unhappy in her marriage and starting an only fans account (behind your partner's back?), claiming to want to deal with older, mature men, (which is obviously no indication of maturity.)
I don't know how you got yourself into the situation you are so unhappy with; but, surely you've had some time to consider it. Amassing wealth the way you are trying to, I would imagine, is not as easy as it seems. It can be, if you are a certain type; but, I imagine like all areas of life, there are those who succeed greatly, and there are a sea of people hoping to hit big; but, really just struggling like everyone else in life.
I think you are just trying to advertise. I don't care if you do or don't have an only fans account; that's your choice. But don't come off like you are some pinnacle of drama-free fun (having three children in an unhappy marriage and setting up a clandestine onlyfans account, is kind of the definition of drama, to some people (everyone has their problems/baggage, right?)), heh. If your story has truth to it, you prefer older men, and you've got yourself into a pickle that has lots of strings attached and lots of responsibilities. That's a tough spot to be in...
Do your best to be a good mother, and if you don't love your man, do your best to take care of yourself, and make a plan to exit that situation.
If part of that plan is doing as you are now doing; so be it. But, I'm not buying it. I'm not judging in regards to starting an onlyfans account and seeking out wealthy patronage, have at it. But, in regards to, 'maturity,' there is very little of that to go around these days, and I'm not seeing a whole lot of it on these forums, in general, and here either.
Money can solve these types of problems sometimes, though; so, good luck, in that regard.
Best of luck.