OP,
Firstly 
for your situation.
As a man, I'd say it is easy for a woman to find someone to have sex with, but it sounds like you (and @Outnumb3red ?) want the right sort of man - one you can trust, and that will be understanding, and willing to take things at your pace - not someone that will be "in like Flynn". (but I could be wrong!)
Trust can be very hard to gain. I had a fwb last year (we met on a on-line dating site) I was very lucky that she trusted me enough for us to dtd on the second date, and we didn't look back. Unfortunately, due to circumstances beyond our control (not covid related) we had to stop seeing each other earlier this year.
It really depends what kind of relationship you want. If you just want casual sex, a FB, or a fwb, then any of the dating apps can be used. Just put something like "looking for fun", or spell it out in your profile. You may have to fend off married men looking for a bit on the side, and a raft of players, so caution is advised.
Adult sites like Fabswingers and Killing Kittens have (at least) men honest enough about what they are looking for, and some even tell you they are married.... Killing Kittens is female led, so you do the approach.. Fabswingers is not, so you are likely to get unwanted attention - make use of the available filters to try and reduce the amount of male appendages you get in your in box.
or you could pm me 
I'm on all of the above 
, looking for the elusive mutually beneficial casual fwb type arrangement I had before - an almost impossible mission for a man! 
(but we live in hope!)
If I can provide any (no assumptions, no strings attached) help or guidance, feel free to ask.