Welcome, Belinda.
The best site for Cornwall is Cornwall OPC.
https://www.cornwall-opc-database.org/search-database/
You will have to use Ancestry or FindmyPast or similar websites for censuses.
For example, here is the transcription for Richard Blake's baptism:
Film No 5748148
Image No 77
Day Month 29-Jan
Year 1832
Parish Circuit Or Chapel Golant, St. Sampson
Forename Richard Curtis
Surname BLAKE
Sex
Age Or Date Of Birth
Father Forename
Mother Forename Jane
Residence Golant
Parish
Status Or Occupation Spinster
Where Baptised
Notes
Transcriber Notes Src: Exeter BTs
Transcriber Karen Duvall