happychildlearns on Family Tree Circles

Just starting out in attempting to do my family tree.:) Already finding this a challenge.
My father John Forrester born 1932 in Atcham,Condover (married: 1965) Elizabeth Ann Forrester 1937 in Shropshire. John and Ann had three children Peter, Robert and Lynn. John was previously married and had one child in that relationship and Ann (as mom was known as, rather then Elizabeth) had a son in her previous marriage.
Dad-John died 1970 in Shropshire- . And Mom-Ann died approx the following year in Shropshire.
Wanting to find any information that is possible. John's mum and dad- Mr and Mrs Peake-Mr Peake wasnt John's natural father.
The only information we have regarding John's natural father is that he was the Organist in a Church in Newport,Telford,Shropshire,
England.
If any one can give me information it would be received most gratefully.Thanking you in advanced,
Lynn