Some great advise on this thread.
The WIfe was like you back in Late 2005. Now she travels up to London on her own and alsorts. But it took time and she needed to get to know her local area around the home first.
I read on here how couples travel all over the UK and further abroad etc. But dont forget to really explore the local area together. The Wife and I used the local buses together Visit the various town centres so the Wife felt comfortable and familiar in them.
One thing she now uses (Well she has never used for real yet just in practise) is using her phone if a little lost to tell her where she is.
Two ways, first GPS (but this can take time and fiddly) and a not so accurate way is to use google maps which uses the postion of the transmitters around you to work out roughly where you are often much much quicker but uses data. Simply by selecting my postion.
My Wife found the best way of meeting people was via the bus she even knows a few local pinoy bus drivers now. She met filpinas of all ages. Found that either those recently over or those who had been here for many many years were the nicest to her. She also met all the local phills as many also used the bus. Even found many who were neighbours.
With A baby as others have said you have many chances to meet others for company (playroups, medical centre) also in many areas as rightly said older people or others with babies will stop and chat/help you talk about the weather and your lovely baby.