Look on meetup.com for local groups and join a few the interest you. If you can get into London there are loads but all big cities should have a good number. Walking groups are good. Whatever you can think of to get out amongst people will be worth it even if, from personal experience, things don't always go as you would want them to. Local papers sometimes have lists of clubs and events coming up. Libraries have lists of local groups and societies.

There are advantages to doing thing on your own. I like company on days out but I also like the flexibility of doing what I want, when I want, how I want and I always find people to talk to.