Even if the things you want to do are unlikely to put you in front of many/any women, do those things. And, yes, there are predators online—just as there are predators IRL, but there are also plenty of decent men out there who want to date and fuck and might be open to dating and fucking you.
You're likelier to meet someone if you're out of the house and moving through the world. Hire babysitters and go places and do shit without your kid. It's your job to weed out the creepy and/or lecherous and/or predatory, just as you did back when you were single and childless.
I have no idea how this is done in person or online. Finding the right man to fit your wants/needs/desires/fantasies is hard.
The search is a kind of journey, and along the way you tend to learn a few things about yourself, and about the society we live in. Everyone knows lots of fabulous single women in their 40s …but can’t think of any equally fabulous single men the same age.
From astrologically inclined vegan hipsters to the slightly more conservative, or even religious, there’s simply something for everyone, so do your research and you’ll soon find your sweet spot…two.