I agree with Ted, if this puts you off then it is probably not for you. However, you do have plenty of time to change the situation if you wish to.
Could fostering be a way to explore whether this is for you?
One aspect is that children do bring you into contact with a lot of other people. So, if you currently have few contacts with friends locally, then is it that you prefer not to, or have not yet made the right friends?
So, if you want a very quiet life then kids tend to bring a lot of people into your life. Initially, social workers etc, but later children will make friends at school etc and that will bring you into contact with their parents, play dates and whatever.
You may well be expected to get experience with children outside of work or family, most adopters are. We were even though we already had a birth child and I had volunteered with kids and even worked with kids briefly!
Getting experience with children can in itself be a great chance to make friends and contacts locally. For example helping with Rainbows, Beavers, helping in a school or church creche. These kind of activities will build contact with adults who also volunteer with kids or work with children.
You will need a supportive circle of friends when you go through the adoptive process. You do need someone to talk to and also someone to turn to if you need help. It doesn't need to be family.
One thing we also did is ensure both our children (birth and adopted, one of each) had God parents. This doesn't actually need to be a religious thing, it is for us but doesn't need to be.
The Godparents are like local aunties and uncles who know our kids and care about them. They have babysat for us, or we have babysat for them, socialized with them etc. We know their kids. In fact we are God parents to some of their kids. A bit like an urban family you create!
Anyway, there are children out there waiting for families and if you want to create a family, by fostering or adoption or whatever, you probably will need support. So good luck with whatever comes next.