Neighbors do tend to stick to themselves and socializing here is DIFFICULT. It’s worth it, but it’s hard. Depending on the part if the country your in affects it a lot as well. I met a lot of people when I started going dancing; there was a regular group and the activity itself is social. You could audit a class at a university perhaps. Depending on your age you’ll find a LOT of people willing to study or work together and you can build friendships that way. I would also suggest just going to the neighbors if you’re interested. You could bring some sort of sealed food (in America it tends to be weird to cook for someone when you don’t know them) and invite them to something. It’s hard, but if you ask the people you see regularly to go and do things it’ll work out. If you’re in a club for pickleball then just ask someone if they’d like to play once or twice more a week.
I know I’ve given a little of information, but let me say that a lot of people my age tend to be in your shoes so the whole environment of meeting people is changing. But a lot of them meet people at university. When I meet new people, I usually just chat with them for a few weeks then ask them for help with something and offer to buy them a lunch as payment. Hopefully the lunch goes well and you go from there