Hi,
I found the sites on ThisIslandWiki which has sites for Guernseyand Jersey, very useful for finding relatives, a lot of the records go back to around 1530, and seem to be cross references to other family pages :
https://www.theislandwiki.org/index.php/Main_Page
Another site I have found useful is
Parrishmouse it contains Parrish records for a lot of counties, although it is incomplete, it is quite useful.
Dan