I do not like number 3 observing your neighbors. Your neighbor might call the local authorities if they see you spying on them or their children.
I will also add to go on blind dates. There are so many different online websites for this. Or try a dating app you can easily download it to your mobile and most of them do not even cost money.
this is for, like good relationship, on dating apps we cannot see the total personality , they may faking their character or other things like very bad history,etc
and observing neighbor means, if you don't leave in a flat, like have a home at street or like that then you may regularly say good morning or talk something to your neighbor this can be a good relationship of both are agree.
it's just off topic don't mind