Hang out in places you like to hang out, do things you like to do, and be around people that like those things and places. It’s just a game of odds - you gotta put yourself in the right places, around the right people and give yourself a lot of opportunities. People - both men and women - are attracted to confident people, who exude a certain “realness” about them.
Live in the moment, show a bit of your true self, and people will take notice. Your odds are better when you’re around people who like the same things and like to do similar stuff. Find your people, whoever they are and wherever they hang out.
Take a cooking class, take a dance class, go to an art museum, take a hike at the park, fuck go take a birdwatching/pottery/cooking class, visit the rec center, go to the gym, take a painting class, take a friend/wingman and go to a party, get into other plants and visit garden stores or specialty houseplant shops. Get a dog - itl force you outside to go on walks and maybe even socialize when you run into other people. Hell, then you’ve instantly got something to talk about - dogs
Enjoy yourself and have fun, and love will find you when you least expect it. I know, it sounds stupid and cliche, but life really is funny like that. (Been together 23 years, married for 14). People like to be around other exciting, engaging, passionate people. Find people who geek out about the same stuff you do and have similar interests and hobbies and immerse yourself in those communities. It’s only “too late”, when you’ve given up.