I was an only child and for, I would say, the first four years of my life I rarely saw other children. I don't think there were playgroups and toddler groups in the 1950's. If there were, I never went to them.
I am not especially outgoing - and wasn't when I was a child - but I still managed to get on quite well with other children and make friends. I wouldn't worry about it too much.
Searching for recipe in Supercook magazine
Angela Rayner lashes out and calls Sunak “pint sized loser”.
Why Are Blokes Obsessed With Noisy Gadgets??